EM-1
ENGINE
C
D
E
F
G
H
I
J
K
L
M
SECTION EM
A
EM
N
O
P
CONTENTS
ENGINE MECHANICAL
VQ40DE
PRECAUTION ...............................................
3
PRECAUTIONS ................................................... 3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
3
Precaution for Drain Engine Coolant .........................3
Precaution for Disconnecting Fuel Piping .................3
Precaution for Removal and Disassembly ................3
Precaution for Inspection, Repair and Replace-
ment ..........................................................................
3
Precaution for Assembly and Installation ..................4
Parts Requiring Angle Tightening .............................4
Precaution for Liquid Gasket .....................................4
PREPARATION ............................................ 6
PREPARATION ................................................... 6
Special Service Tool .................................................6
Commercial Service Tool ..........................................8
SYSTEM DESCRIPTION .............................11
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ............................
11
NVH Troubleshooting - Engine Noise .....................11
Use the Chart Below to Help You Find the Cause
of the Symptom .......................................................
11
PERIODIC MAINTENANCE .........................13
DRIVE BELTS ....................................................13
Exploded View ........................................................ 13
Checking Drive Belts ............................................... 13
Adjustment .............................................................. 13
Removal and Installation ......................................... 13
Drive Belt Auto-Tensioner and Idler Pulley ............. 14
AIR CLEANER FILTER ......................................15
Exploded View ........................................................ 15
Removal and Installation .........................................15
SPARK PLUG ...................................................16
Exploded View .........................................................16
Removal and Installation .........................................16
CAMSHAFT VALVE CLEARANCE ..................18
Valve Clearance ......................................................18
COMPRESSION PRESSURE ...........................22
Compression Pressure ............................................22
REMOVAL AND INSTALLATION ...............24
AIR CLEANER AND AIR DUCT .......................24
Exploded View .........................................................24
Removal and Installation .........................................24
INTAKE MANIFOLD COLLECTOR ..................25
Exploded View .........................................................25
Removal and Installation .........................................25
INTAKE MANIFOLD .........................................28
Exploded View .........................................................28
Removal and Installation .........................................28
EXHAUST MANIFOLD AND THREE WAY
CATALYST ........................................................
30
Exploded View .........................................................30
Removal and Installation (Three Way Catalyst) ......30
Removal and Installation (Exhaust Manifold) ..........31
OIL PAN AND OIL STRAINER .........................34
Exploded View .........................................................34
Removal and Installation .........................................34
IGNITION COIL .................................................40
Exploded View .........................................................40
Removal and Installation .........................................40
ROCKER COVER .............................................41
Exploded View .........................................................41
Removal and Installation .........................................41
Revision: January 2013 2013 Xterra
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