Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti QX56 JA60 2004-2005 Approved 2004_QX56 em
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B ENGINE
A
SECTION
ENGINE MECHANICAL
EM EM
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 3 . INTAKE MANIFOLD ................................................ 15 . F
Precautions for Drain Engine Coolant ..................... 3 . Removal and Installation ....................................... 15 .
Precautions for Disconnecting Fuel Piping ............. 3 . REMOVAL .......................................................... 15 .
Precautions for Removal and Disassembly ............ 3 . INSTALLATION .................................................. 17 . G
Precautions for Inspection, Repair and Replace- INSPECTION AFTER INSTALLATION ............... 18 .
ment ........................................................................ 3
. EXHAUST MANIFOLD AND THREE WAY CATA-
Precautions for Assembly and Installation .............. 3 . LYST ......................................................................... 19
.
H
Parts Requiring Angular Tightening ........................ 3 . Removal and Installation ....................................... 19 .
Precautions for Liquid Gasket ................................. 4 . REMOVAL .......................................................... 19 .
REMOVAL OF LIQUID GASKET SEALING ......... 4 . INSPECTION AFTER REMOVAL ...................... 20 .
LIQUID GASKET APPLICATION PROCEDURE 4 ..... INSTALLATION .................................................. 20 . I
PREPARATION .......................................................... 5 . OIL PAN AND OIL STRAINER ................................ 22 .
Special Service Tools .............................................. 5 . Removal and Installation ....................................... 22 .
Commercial Service Tools ....................................... 7 . REMOVAL .......................................................... 22 . J
NOISE, VIBRATION, AND HARSHNESS (NVH) INSPECTION AFTER REMOVAL ...................... 23 .
TROUBLESHOOTING ............................................... 9 . INSTALLATION .................................................. 24 .
NVH Troubleshooting --Engine Noise .................... 9 . INSPECTION AFTER INSTALLATION ............... 25 .
K
Use the Chart Below to Help You Find the Cause IGNITION COIL ........................................................ 26 .
of the Symptom. .................................................... 10 . Removal and Installation ....................................... 26 .
ENGINE ROOM COVER ..........................................11 . REMOVAL .......................................................... 26 .
Removal and Installation ........................................11 . INSTALLATION .................................................. 26 . L
REMOVAL ...........................................................11 . SPARK PLUG (PLATINUM-TIPPED TYPE) ............ 27 .
INSTALLATION ...................................................11 . Removal and Installation ....................................... 27 .
DRIVE BELTS .......................................................... 12. REMOVAL .......................................................... 27 . M
Checking Drive Belts ............................................. 12 . INSPECTION AFTER REMOVAL ...................... 27 .
Tension Adjustment ............................................... 12 . INSTALLATION .................................................. 28 .
Removal and Installation ....................................... 12 . FUEL INJECTOR AND FUEL TUBE ....................... 29 .
DRIVE BELT ...................................................... 12 . Removal and Installation ....................................... 29 .
INSTALLATION .................................................. 13 . REMOVAL .......................................................... 29 .
Drive Belt Auto Tensioner and Idler Pulley ............ 13 . INSTALLATION .................................................. 30 .
REMOVAL .......................................................... 13 . INSPECTION AFTER INSTALLATION ............... 32 .
INSTALLATION .................................................. 13 . ROCKER COVER .................................................... 33 .
AIR CLEANER AND AIR DUCT .............................. 14 . Removal and Installation ....................................... 33 .
Removal and Installation ....................................... 14 . REMOVAL .......................................................... 33 .
REMOVAL .......................................................... 14 . INSTALLATION .................................................. 34 .
INSTALLATION .................................................. 14 . TIMING CHAIN ......................................................... 35 .
CHANGING AIR CLEANER FILTER .................. 14 . Removal and Installation ....................................... 35 .
REMOVAL .......................................................... 36 .
INSPECTION AFTER REMOVAL ...................... 39 .
INSTALLATION .................................................. 39 .
Revision: August 2007 EM-1 2004 QX56
CAMSHAFT .............................................................. 43
. ASSEMBLY .........................................................77 .
Removal and Installation ....................................... 43 . How to Select Piston and Bearing .........................82 .
REMOVAL .......................................................... 43
. DESCRIPTION ...................................................82 .
INSPECTION AFTER REMOVAL ....................... 47 . HOW TO SELECT PISTON ................................83 .
INSTALLATION ................................................... 49 . HOW TO SELECT CONNECTING ROD BEAR-
Valve Clearance ..................................................... 52
. ING ......................................................................84
.
INSPECTION ...................................................... 52. HOW TO SELECT MAIN BEARING ...................85 .
ADJUSTMENT ................................................... 54 . Inspection After Disassembly .................................89 .
OIL SEAL ................................................................. 56
. CRANKSHAFT END PLAY .................................89 .
Removal and Installation of Valve Oil Seal ............ 56 . CONNECTING ROD SIDE CLEARANCE ..........89 .
REMOVAL .......................................................... 56
. PISTON AND PISTON PIN CLEARANCE ..........89 .
INSTALLATION ................................................... 56 . PISTON RING SIDE CLEARANCE ....................90 .
Removal and Installation of Front Oil Seal ............ 57 . PISTON RING END GAP ...................................90 .
REMOVAL .......................................................... 57
. CONNECTING ROD BEND AND TORSION ......91 .
INSTALLATION ................................................... 57 . CONNECTING ROD BEARING (BIG END) .......91 .
Removal and Installation of Rear Oil Seal ............. 57 . CONNECTING ROD BUSHING OIL CLEAR-
REMOVAL .......................................................... 57
. ANCE (SMALL END) ..........................................91 .
INSTALLATION ................................................... 58 . CYLINDER BLOCK DISTORTION .....................92 .
CYLINDER HEAD .................................................... 59 . MAIN BEARING HOUSING INSIDE DIAMETER...93
On-Vehicle Service ................................................ 59. PISTON TO CYLINDER BORE CLEARANCE ...93
CHECKING COMPRESSION PRESSURE ........ 59 . CRANKSHAFT JOURNAL DIAMETER ..............94 .
Removal and Installation ....................................... 60 . CRANKSHAFT PIN DIAMETER .........................95 .
REMOVAL .......................................................... 60
. OUT-OF-ROUND AND TAPER OF CRANK-
INSPECTION AFTER REMOVAL ....................... 61 . SHAFT ................................................................95
.
INSTALLATION ................................................... 61 . CRANKSHAFT RUNOUT ...................................95 .
Disassembly and Assembly ................................... 62 . CONNECTING ROD BEARING OIL CLEAR-
DISASSEMBLY .................................................. 62 . ANCE ..................................................................95
.
ASSEMBLY ........................................................ 63. MAIN BEARING OIL CLEARANCE ....................96 .
Inspection After Disassembly ................................ 64 . CRUSH HEIGHT OF MAIN BEARING ...............97 .
CYLINDER HEAD DISTORTION ....................... 64 . CRUSH HEIGHT OF CONNECTING ROD
VALVE DIMENSIONS ......................................... 65 . BEARING ............................................................97 .
VALVE GUIDE CLEARANCE ............................. 66 . MAIN BEARING CAP BOLT DIAMETER ............97 .
VALVE GUIDE REPLACEMENT ........................ 66 . CONNECTING ROD BOLT DIAMETER .............98 .
VALVE SEAT CONTACT .................................... 68 . SERVICE DATA AND SPECIFICATIONS (SDS) .....99 .
VALVE SEAT REPLACEMENT .......................... 68 . Standard and Limit .................................................99 .
VALVE SPRING SQUARENESS ........................ 69 . GENERAL SPECIFICATIONS ............................99 .
VALVE SPRING DIMENSIONS AND VALVE DRIVE BELTS .....................................................99 .
SPRING PRESSURE LOAD .............................. 69 . EXHAUST MANIFOLD .......................................99 .
ENGINE ASSEMBLY ............................................... 70 . CAMSHAFT AND CAMSHAFT BEARING ........ 100 .
Removal and Installation ....................................... 70 . CYLINDER HEAD ............................................. 102 .
REMOVAL .......................................................... 70
. CYLINDER BLOCK ........................................... 104 .
INSTALLATION ................................................... 71 . PISTON, PISTON RING AND PISTON PIN ..... 105 .
INSPECTION AFTER INSTALLATION ............... 72 . CONNECTING ROD ......................................... 105 .
CYLINDER BLOCK .................................................. 73 . CRANKSHAFT .................................................. 106 .
Disassembly and Assembly ................................... 73 . MAIN BEARING ................................................ 107 .
DISASSEMBLY .................................................. 74 .
Revision: August 2007 EM-2 2004 QX56
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Drain Engine Coolant EBS00IKY
Drain engine coolant when engine is cooled.
EM
Precautions for Disconnecting Fuel Piping EBS00IKZ
G Before starting work, make sure no fire or spark producing items are in the work area.
G Release fuel pressure before disconnecting and disassembly. C
G After disconnecting pipes, plug openings to stop fuel leakage.
Precautions for Removal and Disassembly EBS00IL0
D
G When instructed to use special service tools, use the specified tools. Always be careful to work safely,
avoid forceful or uninstructed operations.
G Exercise maximum care to avoid damage to mating or sliding surfaces. E
G Cover openings of engine system with tape or the equivalent, if necessary, to seal out foreign materials.
G Mark and arrange disassembly parts in an organized way for easy troubleshooting and assembly.
G When loosening nuts and bolts, as a basic rule, start with the one furthest outside, then the one diagonally F
opposite, and so on. If the order of loosening is specified, do exactly as specified. Power tools may be
used where noted in the step.
Precautions for Inspection, Repair and Replacement EBS00IL1 G
Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and
replace if necessary.
H
Precautions for Assembly and Installation EBS00IL2
G Use torque wrench to tighten bolts or nuts to specification.
G When tightening nuts and bolts, as a basic rule, equally tighten in several different steps starting with the I
ones in center, then ones on inside and outside diagonally in this order. If the order of tightening is speci-
fied, do exactly as specified.
G Replace with new gasket, packing, oil seal or O-ring. J
G Thoroughly wash, clean, and air-blow each part. Carefully check engine oil or engine coolant passages for
any restriction and blockage.
G Avoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust. K
Before assembly, oil sliding surfaces well.
G Release air within route when refilling after draining engine coolant.
G Before starting engine, apply fuel pressure to fuel lines with turning ignition switch ON (with engine L
stopped). Then make sure that there are no leaks at fuel line connections.
G After repairing, start engine and increase engine speed to check engine coolant, fuel, oil, and exhaust
systems for leakage. M
Parts Requiring Angular Tightening EBS00IL3
G For final tightening of the following engine parts use Tool:
Tool number : KV10112100 (BT-8653-A)
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