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CO


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B ENGINE

                                                                                                                                                                  A


                                                                                                                                                                  CO
                                                                                                SECTION
                                                                          ENGINE COOLING SYSTEM                                                                   C


                                                                                                                                                                  D


                                                                                                                                                                  E
                                                                 CONTENTS
                               KA24DE                                                                 VG33E and VG33ER                                            F

PRECAUTIONS ......................................................... 3 .        PRECAUTIONS ....................................................... 18  .
 Precautions for Supplemental Restraint System                                    Precautions for Supplemental Restraint System
                                                                                                                                                                  G
 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-                                          (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
 SIONER" ................................................................. 3
                                                                        .         SIONER" ................................................................ 18
                                                                                                                                                         .
 Precautions for Liquid Gasket ................................. 3      .         Precautions for Liquid Gasket ............................... 18       .
   REMOVAL OF LIQUID GASKET ......................... 3                 .           REMOVAL OF LIQUID GASKET ........................ 18                 .        H
   LIQUID GASKET APPLICATION PROCEDURE 3                                .....     Precautions for Liquid Gasket ............................... 18       .
PREPARATION .......................................................... 5.           REMOVAL OF LIQUID GASKET ........................ 18                 .
 Special Service Tools .............................................. 5 .           LIQUID GASKET APPLICATION PROCEDURE 19                               ...       I
OVERHEATING CAUSE ANALYSIS ......................... 6                  .        PREPARATION ........................................................ 20 .
 Troubleshooting Chart ............................................. 6  .         Special Service Tools ............................................ 20  .
COOLING SYSTEM ................................................... 7    .        OVERHEATING CAUSE ANALYSIS ....................... 21                   .        J
 Cooling Circuit ......................................................... 7
                                                                        .         Troubleshooting Chart ........................................... 21   .
ENGINE COOLANT ................................................... 8    .        COOLING SYSTEM ................................................. 22     .
 System Check ......................................................... 8
                                                                        .         Cooling Circuit ....................................................... 22
                                                                                                                                                         .
   CHECKING COOLING SYSTEM HOSES ........... 8                          .        ENGINE COOLANT ................................................. 23     .        K
   CHECKING RADIATOR ....................................... 8          .         System Check ....................................................... 23.
   CHECKING COOLING SYSTEM FOR LEAKS..... 8                                         CHECKING COOLING SYSTEM HOSES .......... 23                          .
   CHECKING RADIATOR CAP ............................... 8              .           CHECKING RADIATOR ..................................... 23           .        L
 Refilling Engine Coolant .......................................... 9  .           CHECKING COOLING SYSTEM FOR LEAKS ... 23
WATER PUMP ......................................................... 10 .           CHECKING RADIATOR CAP ............................. 23               .
 Removal ................................................................ 10
                                                                        .         Refilling Engine Coolant ........................................ 24   .        M
 Inspection ...............................................................11
                                                                        .        WATER PUMP ......................................................... 25 .
 Installation ..............................................................11
                                                                        .         Removal ................................................................ 25
                                                                                                                                                         .
THERMOSTAT ......................................................... 13 .         Inspection .............................................................. 26
                                                                                                                                                         .
 Removal ................................................................ 13
                                                                        .         Installation ............................................................. 26
                                                                                                                                                         .
 Inspection .............................................................. 13
                                                                        .        THERMOSTAT ......................................................... 28 .
 Installation ............................................................. 13
                                                                        .         Removal ................................................................ 28
                                                                                                                                                         .
RADIATOR ............................................................... 14
                                                                        .         Inspection .............................................................. 28
                                                                                                                                                         .
 Components .......................................................... 14
                                                                        .         Installation ............................................................. 29
                                                                                                                                                         .
 Removal and Installation ....................................... 14    .        RADIATOR ............................................................... 30
                                                                                                                                                         .
 Inspection .............................................................. 15
                                                                        .         Components .......................................................... 30
                                                                                                                                                         .
COOLING FAN (CRANKSHAFT DRIVEN) ............. 16                        .         Removal and Installation ....................................... 30    .
 Removal and Installation ....................................... 16    .         Inspection .............................................................. 31
                                                                                                                                                         .
 Inspection .............................................................. 16
                                                                        .        COOLING FAN (CRANKSHAFT DRIVEN) .............. 32                       .
SERVICE DATA AND SPECIFICATIONS (SDS) ..... 17                          .         Removal and Installation ....................................... 32    .
 Thermostat ............................................................ 17
                                                                        .         Inspection .............................................................. 32
                                                                                                                                                         .
 Radiator ................................................................. 17
                                                                        .


                                                                           CO-1
SERVICE DATA AND SPECIFICATIONS (SDS) ..... 33                          .
 Thermostat ............................................................. 33
                                                                        .
 Radiator ................................................................. 33
                                                                        .




                                                                           CO-2
                                              PRECAUTIONS
                                                                                                    [KA24DE]
PRECAUTIONS                                                         PFP:00001
                                                                                                                       A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER"                                                                                         EBS00F13


The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along CO
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front C
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:                                                                                                             D
q    To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
     in the event of a collision which would result in air bag inflation, all maintenance must be per-
     formed by an authorized NISSAN/INFINITI dealer.                                                                 E
q    Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
     sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
     Bag Module, see the SRS section.                                                                                F
q    Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
     Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
     harness connectors.
                                                                                                                     G
Precautions for Liquid Gasket                                                                               EBS00EZY

REMOVAL OF LIQUID GASKET
q    After removing the mounting bolts and nuts, separate the mating                                                   H
     surface using a seal cutter and remove the sealant.
CAUTION:
Be careful not to damage the mating surfaces.                                                                          I
q    In areas where the cutter is difficult to use, use a plastic hammer
     to lightly tap the areas where the sealant is applied.
CAUTION:                                                                                                               J
If for some unavoidable reason a tool such as a flat-bladed
screwdriver is used, be careful not to damage the mating sur-
faces.
                                                                                                         PBIC0002E     K
LIQUID GASKET APPLICATION PROCEDURE
1.   Using a scraper, remove the old sealant adhering to the mating
                                                                                                                       L
     surface.
     q Remove the sealant completely from the groove, mounting
        bolts, and bolt holes.
                                                                                                                       M
2.   Clean the mating surface thoroughly to remove adhering mois-
     ture, grease and foreign materials.
3.   Install the sealant tube into the tube presser.
     Use Genuine Silicone RTV or equivalent. Refer to GI-42,
     "Recommended Chemical Products and Sealants" .
                                                                                                         PBIC0003E




                                                     CO-3
                                              PRECAUTIONS
                                                                               [KA24DE]
4.   Apply the sealant without breaks to the specified area with the
     specified dimensions.
     q If there is a groove for the sealant application, apply the seal-
       ant to the groove.




                                                                                  EMA0622D




     q   As for the bolt holes, normally apply the sealant inside the
         holes. If specified, it should be applied outside the holes.
         Make sure to read the instructions in this manual.
     q Within five minutes of sealant application, install the mating
         component.
     q If the sealant protrudes, wipe it off immediately.

     q Do not retighten after the installation.

     q After 30 minutes or more have passed from the installation, fill
         the engine with the correct oil and coolant. Refer to MA-12,
         "Recommended Fluids and Lubricants" .                                    SEM159F
     CAUTION:
     If there are specific instructions in the service manual, observe them.




                                                      CO-4
                                                       PREPARATION
                                                                                                                           [KA24DE]
PREPARATION                                                                                                                     PFP:00002
                                                                                                                                                A
Special Service Tools                                                                                                                EBS00EZZ

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
  Tool number                                                                            Description
                                                                                                                                                CO
  (Kent-Moore No.)
  Tool name
  EG17650301                                                                             Adapting radiator cap tester to radiator filler
  (J33984-A)                                                                             neck                                                   C
  Radiator cap tester adapter                                                            a: 28 (1.10) dia.
                                                                                         b: 31.4 (1.236) dia.
                                                                                         c: 41.3 (1.626) dia.
                                                                                         Unit: mm (in)                                          D

                                                                         NT564


  WS39930000                                                                             Pressing the tube of liquid gasket                     E
  (      --        )
  Tube presser

                                                                                                                                                F


                                                                         NT052
                                                                                                                                                G


                                                                                                                                                H



                                                                                                                                                 I


                                                                                                                                                J



                                                                                                                                                K


                                                                                                                                                L



                                                                                                                                                M




                                                                CO-5
                                      OVERHEATING CAUSE ANALYSIS
                                                                                                                             [KA24DE]
OVERHEATING CAUSE ANALYSIS                                                                                                        PFP:00012

Troubleshooting Chart                                                                                                                 EBS00GJG


                                           Symptom                                                      Check items
                                               Water pump malfunction         Worn or loose drive belt
                                               Thermostat stuck closed        Coolant circulation
                                                                              Dust contamination or rock
               Poor heat transfer              Damaged fins                   clogging                                       --
                                                                              Mechanical damage
                                               Clogged radiator cooling       Excess foreign material
                                               tube                           (rust, dirt, sand, etc.)
                                               Fan coupling does not
                                               operate
               Reduced air flow                High resistance to fan rota-   Fan and coupling                               --
                                               tion
                                               Damaged fan blades
               Damaged radiator shroud                      --                             --                                --
               Improper coolant mixture
Cooling sys-                                                --                             --                                --
               ratio
tem parts
malfunction    Poor coolant quality                         --                Periodic maintenance                           --
                                                                                                              Loose clamp
                                                                              Cooling hose
                                                                                                              Cracked hose
                                                                              Water pump                      Poor sealing
                                                                                                              Loose
                                                                              Radiator cap
                                                                                                              Poor sealing
                                               Coolant leaks
                                                                                                              O-ring for damage, deterio-
               Insufficient coolant                                                                           ration or improper fitting
                                                                              Radiator
                                                                                                              Cracked radiator tank
                                                                                                              Cracked radiator core
                                                                              Reservoir tank                  Cracked reservoir tank
                                                                                                              Cylinder head deterioration
                                                                              Exhaust gas leaks into
                                               Overflowing reservoir tank                                     Cylinder head gasket dete-
                                                                              cooling system
                                                                                                              rioration
                                                                                                              High engine rpm under no
                                                                                                              load
                                                                                                              Driving in low gear for
                                                                              Abusive driving
                                                                                                              extended time
                                                                                                              Driving at extremely high
                                                                                                              speed
                            --                 Overload on engine
                                                                              Powertrain system mal-
                                                                              function
Except cool-
ing system                                                                    Installed improper size
                                                                              wheels and tires                               --
parts mal-
function                                                                      Dragging brakes
                                                                              Improper ignition timing
                                               Blocked radiator grille        Installed car brassiere
                                               Blocked bumper
               Blocked or restricted air
                                               Blocked radiator               Mud contamination or                           --
               flow
                                               Blocked condenser              paper clogging

                                               Installed large fog lamp

                                                                  CO-6
                  COOLING SYSTEM
                                   [KA24DE]
COOLING SYSTEM                       PFP:21020
                                                        A
Cooling Circuit                              EBS00F01




                                                        CO



                                                        C


                                                        D


                                                        E



                                                        F


                                                        G


                                                        H



                                                         I


                                                        J


                                    ALC117
                                                        K


                                                        L



                                                        M




                       CO-7
                                           ENGINE COOLANT
                                                                                                   [KA24DE]
ENGINE COOLANT                                                                                        PFP:KQ100

System Check                                                                                               EBS00F02


WARNING:
q Never remove the radiator cap when the engine is hot. Serious burns could occur from high pres-
  sure coolant escaping from the radiator.
q Wrap a thick cloth around the radiator cap. Slowly turn it a quarter turn to allow built-up pressure
  to escape. Carefully remove the radiator cap by turning it all the way.
CHECKING COOLING SYSTEM HOSES
q    Check hoses for improper attachment, leaks, cracks, damage, chafing and deterioration.
CHECKING RADIATOR
Check radiator for mud or clogging. If necessary, clean radiator as follows:
CAUTION:
q  Be careful not to bend or damage the radiator fins.
q  When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radi-
   ator shroud and horns.
q  Tape the harness connectors to prevent water from entering.
1. Apply water by hose to the back side of the radiator core vertically downward.
2. Apply water again to all radiator core surfaces once per minute.
3. Stop washing when water flows clear coming out of the radiator.
4. Blow air into the back side of radiator core vertically downward.
     q Use compressed air lower than 490 kPa (5 kg/cm2 , 71 psi) and keep the air hose end more than 30 cm
       (11.8 in) away from the core.
5.   Blow air again into all the radiator core surfaces once per minute until no water blows out and the core is
     dry.
CHECKING COOLING SYSTEM FOR LEAKS
q    To check for leakage, apply pressure to the cooling system with
     a radiator cap tester.
     CAUTION:
     Higher pressure than specified may cause radiator damage.
         Testing pressure    : 157 kPa (1.6 kg/cm2 , 23 psi)




                                                                                                        SLC756A


CHECKING RADIATOR CAP
q    To check radiator cap, apply pressure to radiator cap with a radi-
     ator cap tester.
         Radiator cap relief pressure
         Standard : 78 - 98 kPa (0.8 - 1.0 kg/cm2 , 11 - 14 psi)
         Limit       : 59 kPa (0.6 kg/cm2 , 9 psi)




                                                                                                        SLC755A




                                                     CO-8
                                        ENGINE COOLANT
                                                                                            [KA24DE]
q   Pull the negative pressure valve to open it.
    Check that it closes completely when released.                                                               A


                                                                                                                 CO



                                                                                                                 C

                                                                                                   SMA967B

                                                                                                                 D
Refilling Engine Coolant                                                                              EBS00F03


For details on refilling the engine cooling system, refer to MA-17, "REFILLING ENGINE COOLANT" .
                                                                                                                 E



                                                                                                                 F


                                                                                                                 G


                                                                                                                 H



                                                                                                                  I


                                                                                                                 J



                                                                                                                 K


                                                                                                                 L



                                                                                                                 M




                                                 CO-9
                                          WATER PUMP
                                                                                        [KA24DE]
WATER PUMP                                                                                 PFP:21020

Removal                                                                                          EBS00F04




                                                                                          WBIA0446E

  1.   Water inlet                2.   Thermostat                3.   Water pump
  4.   Water pump pulley          5.   Fan coupling              6.   Fan

CAUTION:
q  When removing water pump assembly, be careful not to get coolant on drive belts.
q  Water pump cannot be disassembled and should be replaced as a unit.
q  After installing water pump, connect hose and clamp securely. Check for leaks using radiator cap
   tester.
1. Drain coolant from engine.
   Refer to MA-16, "DRAINING ENGINE COOLANT" .
2. Remove fan coupling with fan.
3. Remove power steering pump drive belt, generator drive belt, and A/C compressor drive belt.
4. Remove water pump pulley.
5. Remove water pump.




                                                CO-10
                                             WATER PUMP
                                                                                                 [KA24DE]
Inspection                                                                                               EBS00F05

                                                                                                                    A
q    Check body assembly for rust or corrosion.
q    Check for rough operation due to excessive end play.
                                                                                                                    CO



                                                                                                                    C


                                                                                                                    D
                                                                                                      SLC738


Installation                                                                                             EBS00F06


1.   Use a scraper to remove liquid gasket from water pump.                                                         E
     q Also remove traces of liquid gasket from mating surface
       of cylinder block.
                                                                                                                    F


                                                                                                                    G


                                                                                                                    H
                                                                                                      SLC188A



2.   Apply a continuous bead of liquid gasket to mating surface of
     water pump.                                                                                                     I
     q Use Genuine Anaerobic Liquid Gasket or equivalent.
       Refer to GI-42, "Recommended Chemical Products and
       Sealants" .                                                                                                  J



                                                                                                                    K

                                                                                                      ALC078

                                                                                                                    L
3.   Install water pump. Tighten water pump bolts to specification as
     shown.
                                                                                                                    M




                                                                                                      ALC077



4.   Install water pump pulley.
5.   Install power steering pump drive belt, generator drive belt, and A/C compressor drive belt. Refer to MA-
     15, "Checking Drive Belts" .




                                                  CO-11
                                        WATER PUMP
                                                                [KA24DE]
6.   Install fan with fan coupling.
7.   Refill engine cooling system. Refer to MA-17, "REFILLING
     ENGINE COOLANT" .




                                                                   WBIA0444E




                                             CO-12
                                                  THERMOSTAT
                                                                                    [KA24DE]
THERMOSTAT                                                                            PFP:21200
                                                                                                     A
Removal                                                                                   EBS00F07


q       Be careful not to spill coolant over engine compartment.
        Use a rag to absorb coolant.                                                                 CO
1.      Drain coolant from engine. Refer to MA-16, "DRAINING
        ENGINE COOLANT" .
2.      Remove air cleaner and air duct assembly.                                                    C
3.      Remove water hose from water inlet housing.
4.      Remove water inlet housing, then take out thermostat.
                                                                                                     D

                                                                                       ALC087

                                                                                                     E
Inspection                                                                                EBS00F08


1.      Check valve seating condition at normal room temperature. It
        should seat tightly.
                                                                                                     F
2.      Check valve opening temperature and valve lift.
    Valve opening temperature                      76.5



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