Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Sentra 2006-2009 Approved Nissan Sentra 2008 EM
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ENGINE
A
SECTION
ENGINE MECHANICAL
EM EM
C
D
E
CONTENTS
MR20DE Changing Air Cleaner Filter ....................................17
. F
SERVICE INFORMATION ........................... 3
. INTAKE MANIFOLD ......................................... 18
Component .............................................................18
.
G
PRECAUTIONS .................................................. 3
. Removal and Installation ........................................18.
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- EXHAUST MANIFOLD ...................................... 21
SIONER" .................................................................. 3
. Component .............................................................21
. H
Precaution for Procedure without Cowl Top Cover 3 ...... Removal and Installation ........................................21.
Precaution Necessary for Steering Wheel Rota-
OIL PAN ............................................................ 24
tion After Battery Disconnect .................................... 3 . I
Component .............................................................24
.
Precaution for Drain Coolant .................................... 4 .
Removal and Installation ........................................24.
Precaution for Disconnecting Fuel Piping ................ 4 .
Precaution for Removal and Disassembly ............... 4 . IGNITION COIL, SPARK PLUG AND ROCK- J
Precaution for Inspection, Repair and Replace- ER COVER ........................................................ 30
ment ......................................................................... 4
. Component .............................................................30
.
Precaution for Assembly and Installation ................. 4 . Removal and Installation ........................................30.
Parts Requiring Angular Tightening ......................... 4 . K
Precaution for Liquid Gasket .................................... 5 . FUEL INJECTOR AND FUEL TUBE ................ 33
Component .............................................................33
.
PREPARATION .................................................. 7
. Removal and Installation ........................................33. L
Special Service Tool ................................................ 7
.
Commercial Service Tool ......................................... 9
. TIMING CHAIN .................................................. 37
Component .............................................................37
.
NOISE, VIBRATION AND HARSHNESS M
Removal and Installation ........................................38.
(NVH) TROUBLESHOOTING ...........................11
.
NVH Troubleshooting - Engine Noise .................... 11 . CAMSHAFT ....................................................... 46
Use the Chart Below to Help You Find the Cause Component .............................................................46
. N
of the Symptom ...................................................... 12
. Removal and Installation ........................................46.
Valve Clearance .....................................................54
.
DRIVE BELTS ...................................................13
.
Component ............................................................. 13
. OIL SEAL .......................................................... 58 O
Checking Drive Belts .............................................. 13 . Removal and Installation of Valve Oil Seal .............58
.
Tension Adjustment ............................................... 13 . Removal and Installation of Front Oil Seal .............58
.
Removal and Installation ........................................ 13 . Removal and Installation of Rear Oil Seal ..............59
. P
Component ............................................................. 14
.
Removal and Installation of Drive Belt Auto Ten- CYLINDER HEAD ............................................. 61
sioner ..................................................................... 14
. On-Vehicle Service .................................................61
.
Component .............................................................62
.
AIR CLEANER AND AIR DUCT .......................16
. Removal and Installation ........................................62.
Component ............................................................. 16
. Component .............................................................64
.
Removal and Installation ........................................ 16
. Disassembly and Assembly ....................................65 .
Revision: July 2007 EM-1 2008 Sentra
Inspection After Disassembly ................................ 66
. INTAKE MANIFOLD ........................................ 128
.
Removal and Installation ...................................... 128
.
CYLINDER BLOCK .......................................... 71
.
Component ............................................................ 71
. EXHAUST MANIFOLD AND THREE WAY
Disassembly and Assembly ................................... 72 . CATALYST ...................................................... 132
.
How to Select Piston and Bearing ......................... 80 . Removal and Installation ...................................... 132
.
Inspection After Disassembly ................................ 88 .
OIL PAN AND OIL STRAINER ....................... 134
.
ENGINE ASSEMBLY ........................................ 99
. Removal and Installation ...................................... 134
.
Component ............................................................ 99
.
Removal and Installation ....................................... 99. IGNITION COIL ................................................ 137
.
Removal and Installation ...................................... 137
.
SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................... 103
. SPARK PLUG .................................................. 138
.
Standard and Limit ...............................................103
. Removal and Installation ...................................... 138
.
QR25DE FUEL INJECTOR AND FUEL TUBE ............... 140
.
SERVICE INFORMATION ......................... 114
. Removal and Installation ...................................... 140
.
PRECAUTIONS .............................................. 114
. ROCKER COVER ............................................ 143
.
Removal and Installation ...................................... 143
.
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- CAMSHAFT ..................................................... 145
.
SIONER" ...............................................................114
. Removal and Installation ...................................... 145
.
Precaution for Draining Coolant ...........................114 . Inspection After Installation .................................. 152
.
Precaution for Disconnecting Fuel Piping .............114 . Valve Clearance ................................................... 153
.
Precaution for Removal and Disassembly ............114 .
Precaution for Inspection, Repair and Replace- TIMING CHAIN ................................................ 156
.
ment ......................................................................114
. Removal and Installation ...................................... 156
.
Precaution for Assembly and Installation .............114 .
Parts Requiring Angular Tightening ......................115 . OIL SEAL ......................................................... 164
.
Precaution for Liquid Gasket ................................115 . Removal and Installation of Valve Oil Seal .......... 164
.
Removal and Installation of Front Oil Seal ........... 164
.
PREPARATION .............................................. 117
. Removal and Installation of Rear Oil Seal ........... 165
.
Special Service Tool .............................................117
.
Commercial Service Tool .....................................119. CYLINDER HEAD ............................................ 167
.
On-Vehicle Service .............................................. 167
.
NOISE, VIBRATION AND HARSHNESS Removal and Installation ...................................... 168
.
(NVH) TROUBLESHOOTING ......................... 122
. Disassembly and Assembly ................................. 170 .
NVH Troubleshooting - Engine Noise ...................122 . Inspection After Disassembly ............................... 172.
Use the Chart Below to Help You Find the Cause
of the Symptom ....................................................122
. ENGINE ASSEMBLY ...................................... 177
.
Removal and Installation ...................................... 177
.
DRIVE BELTS ................................................. 124
.
Checking Drive Belts ............................................124 . CYLINDER BLOCK ......................................... 180
.
Tension Adjustment ..............................................124 . Disassembly and Assembly ................................. 180
.
Removal and Installation ......................................124 . How to Select Piston and Bearing ....................... 188
.
Removal and Installation of Drive Belt Auto-ten- Inspection After Disassembly ............................... 194
.
sioner ....................................................................125
.
SERVICE DATA AND SPECIFICATIONS
AIR CLEANER AND AIR DUCT ..................... 127
. (SDS) ............................................................... 204
.
Removal and Installation ......................................127
. Standard and Limit ............................................... 204
.
Revision: July 2007 EM-2 2008 Sentra
PRECAUTIONS
< SERVICE INFORMATION > [MR20DE]
SERVICE INFORMATION A
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT EM
PRE-TENSIONER" INFOID:0000000001849559
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along C
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
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. D
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING: E
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