Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Sentra 2000-2005 Approved Nissan Sentra 2002 EM
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B ENGINE
A
EM
SECTION
ENGINE MECHANICAL C
D
E
CONTENTS
QG18DE Disassembly .......................................................... 39
. F
Inspection .............................................................. 40
.
PRECAUTIONS ......................................................... 4 . CYLINDER HEAD DISTORTION ....................... 40 .
Parts Requiring Angular Tightening ........................ 4 . CAMSHAFT VISUAL CHECK ............................ 40 . G
Liquid Gasket Application Procedure ...................... 4 . CAMSHAFT RUNOUT ....................................... 40 .
PREPARATION .......................................................... 5 . CAMSHAFT CAM HEIGHT ................................ 40 .
Special Service Tools .............................................. 5 . CAMSHAFT JOURNAL CLEARANCE ............... 40 .
Commercial Service Tools ....................................... 7 . H
CAMSHAFT END PLAY ..................................... 41 .
NOISE, VIBRATION, AND HARSHNESS (NVH) CAMSHAFT SPROCKET RUNOUT ................... 42 .
TROUBLESHOOTING ............................................... 9 . VALVE GUIDE CLEARANCE ............................. 42 .
Noise, Vibration and Harshness (NVH) Trouble- VALVE GUIDE REPLACEMENT ........................ 42 . I
shooting ................................................................... 9
. VALVE SEATS .................................................... 44 .
NVH TROUBLESHOOTING -- ENGINE NOISE 9 ..... REPLACING VALVE SEAT FOR SERVICE
BASIC INSPECTION ............................................... 13 . PARTS ................................................................ 44
. J
Measurement of Compression Pressure ............... 13 . VALVE DIMENSIONS ......................................... 45 .
OUTER COMPONENT PARTS ............................... 15 . VALVE SPRING .................................................. 45 .
Removal and Installation ....................................... 15 . VALVE LIFTER AND VALVE SHIM .................... 46 .
QG18DE (EXCEPT CALIF. CA MODEL) ........... 17 . K
Assembly ............................................................... 46
.
QG18DE (CALIF. CA MODEL) .......................... 18 . Installation ............................................................. 47
.
OIL PAN ................................................................... 19
. Valve Clearance .................................................... 50.
Components .......................................................... 19
. CHECKING ........................................................ 50 . L
Removal ................................................................ 19
. ADJUSTING ....................................................... 51 .
Installation ............................................................. 20
. ENGINE ASSEMBLY ............................................... 54 .
FUEL INJECTOR AND FUEL TUBE ....................... 22 . Removal and Installation ....................................... 54 . M
Removal and Installation ....................................... 22 . REMOVAL .......................................................... 55.
REMOVAL .......................................................... 22. INSTALLATION .................................................. 57 .
INSTALLATION .................................................. 22 . CYLINDER BLOCK ................................................. 58 .
INSPECTION AFTER INSTALLATION .............. 23 . Components .......................................................... 58
.
TIMING CHAIN ........................................................ 24 . Removal and Installation ....................................... 59 .
Components .......................................................... 24
. Disassembly .......................................................... 59
.
Removal ................................................................ 25
. PISTON AND CRANKSHAFT ............................ 59 .
Inspection .............................................................. 28
. Inspection .............................................................. 60
.
Installation ............................................................. 28
. PISTON AND PISTON PIN CLEARANCE ......... 60 .
OIL SEAL ................................................................. 33
. PISTON PIN SIDE CLEARANCE ....................... 61 .
Replacement ......................................................... 33
. PISTON RING END GAP ................................... 61 .
VALVE OIL SEAL ............................................... 33 . CONNECTING ROD BEND AND TORSION ..... 61 .
FRONT OIL SEAL .............................................. 33 . CYLINDER BLOCK DISTORTION AND WEAR... 62
REAR OIL SEAL ................................................ 35 . PISTON-TO-BORE CLEARANCE ...................... 62 .
CYLINDER HEAD .................................................... 36 . CRANKSHAFT ................................................... 63 .
Components .......................................................... 36
. BEARING CLEARANCE .................................... 64 .
Removal ................................................................ 37
.
EM-1
CONNECTING ROD BUSHING CLEARANCE DRIVE BELTS ...........................................................89 .
(SMALL END) ..................................................... 67 . Checking Drive Belts ..............................................89 .
REPLACEMENT OF CONNECTING ROD Tension Adjustment ................................................89 .
BUSHING (SMALL END) ................................... 67 . Removal and Installation ........................................89 .
FLYWHEEL RUNOUT ........................................ 68 . REMOVAL ...........................................................89 .
Assembly ............................................................... 68
. INSTALLATION ...................................................89 .
PISTON .............................................................. 68
. Removal and Installation of Auxiliary Drive Belt
CRANKSHAFT ................................................... 69 . Auto-tensioner ........................................................90.
SERVICE DATA AND SPECIFICATIONS (SDS) ..... 72 . REMOVAL ...........................................................90 .
General Specifications ........................................... 72 . INSTALLATION ...................................................90 .
Compression Pressure .......................................... 72 . AIR CLEANER AND AIR DUCT ..............................91 .
Cylinder Head ........................................................ 72. Removal and Installation ........................................91 .
Valve ...................................................................... 73
. REMOVAL ...........................................................92 .
VALVE ................................................................. 73
. INSTALLATION ...................................................92 .
VALVE SPRING .................................................. 73 . CHANGING THE AIR CLEANER ELEMENT .....92 .
VALVE LIFTER ................................................... 73 . INTAKE MANIFOLD .................................................93 .
VALVE CLEARANCE .......................................... 73 . Removal and Installation ........................................93 .
VALVE GUIDE .................................................... 74 . REMOVAL ...........................................................93 .
AVAILABLE SHIMS ............................................ 74 . INSPECTION AFTER REMOVAL .......................95 .
VALVE SEAT ...................................................... 76 . INSTALLATION ...................................................95 .
VALVE SEAT RESURFACE LIMIT ..................... 77 . INSPECTION AFTER INSTALLATION ...............97 .
Camshaft and Camshaft Bearing .......................... 77 . EXHAUST MANIFOLD AND THREE WAY CATA-
Cylinder Block ........................................................ 78
. LYST .........................................................................98
.
Piston, Piston Ring and Piston Pin ........................ 78 . Removal and Installation ........................................98 .
PISTON .............................................................. 78
. REMOVAL ...........................................................98 .
PISTON RING .................................................... 79 . INSPECTION AFTER REMOVAL .......................99 .
PISTON PIN ....................................................... 79 . INSTALLATION ...................................................99 .
Connecting Rod ..................................................... 79 . OIL PAN AND OIL STRAINER ............................... 100 .
Crankshaft ............................................................. 79
. Removal and Installation ...................................... 100 .
Main Bearing ......................................................... 80. REMOVAL ......................................................... 100 .
STANDARD ........................................................ 80 . INSPECTION AFTER REMOVAL ..................... 101 .
UNDERSIZE ....................................................... 80 . INSTALLATION ................................................. 101 .
Connecting Rod Bearing ....................................... 80 . INSPECTION AFTER INSTALLATION ............. 102 .
STANDARD SIZE ............................................... 80 . IGNITION COIL ...................................................... 103 .
UNDERSIZE ....................................................... 80 . Removal and Installation ...................................... 103 .
Bearing Clearance ................................................. 80 . REMOVAL ......................................................... 103 .
Miscellaneous Components ................................... 80 . INSTALLATION ................................................. 103 .
SPARK PLUG ......................................................... 104 .
QR25DE Removal and Installation ...................................... 104 .
REMOVAL ......................................................... 104 .
PRECAUTIONS ........................................................ 81 . INSPECTION AFTER REMOVAL ..................... 104 .
Precautions for Draining Coolant ........................... 81 . INSTALLATION ................................................. 105 .
Precautions for Disconnecting Fuel Piping ............ 81 . FUEL INJECTOR AND FUEL TUBE ...................... 106 .
Precautions for Removal and Disassembly ........... 81 . Removal and Installation ...................................... 106 .
Precautions for Inspection, Repair and Replace- REMOVAL ......................................................... 106 .
ment ....................................................................... 81
. INSTALLATION ................................................. 107 .
Precautions for Assembly and Installation ............. 81 . INSPECTION AFTER INSTALLATION ............. 108 .
Parts Requiring Angular Tightening ....................... 81 . ROCKER COVER ................................................... 109 .
Precautions for Liquid Gasket ............................... 82 . Removal and Installation ...................................... 109 .
REMOVAL OF LIQUID GASKET SEALING ....... 82 . REMOVAL ......................................................... 109 .
LIQUID GASKET APPLICATION PROCEDURE 82 ... INSTALLATION ................................................. 109 .
PREPARATION ........................................................ 83 . CAMSHAFT ............................................................ 111 .
Special Service Tools ............................................ 83 . Removal and Installation ...................................... 111 .
Commercial Service Tools ..................................... 85 . REMOVAL ......................................................... 111 .
NOISE, VIBRATION, AND HARSHNESS (NVH) INSPECTION AFTER REMOVAL ..................... 113 .
TROUBLESHOOTING ............................................. 87 . INSTALLATION ................................................. 115 .
NVH Troubleshooting -- Engine Noise ................. 87 . Valve Clearance ................................................... 118 .
Use the Chart Below to Help You Find the Cause INSPECTION .................................................... 118 .
of the Symptom. .................................................... 88 . ADJUSTMENT .................................................. 119 .
EM-2
TIMING CHAIN ...................................................... 121 . HOW TO SELECT A MAIN BEARING ............. 153 .
Removal and Installation ..................................... 121 . Inspection After Disassembly .............................. 156 . A
REMOVAL ........................................................ 122 . CRANKSHAFT SIDE CLEARANCE ................. 156 .
INSPECTION AFTER REMOVAL .................... 124 . CONNECTING ROD SIDE CLEARANCE ........ 157 .
INSTALLATION ................................................ 125 . PISTON AND PISTON PIN CLEARANCE ....... 157 . EM
CYLINDER HEAD .................................................. 129 . PISTON RING SIDE CLEARANCE .................. 158 .
On-Vehicle Service .............................................. 129 . PISTON RING END GAP ................................. 158 .
CHECKING COMPRESSION PRESSURE ..... 129 . CONNECTING ROD BEND AND TORSION ... 158 .
Removal and Installation ..................................... 130 . CONNECTING ROD BEARING (BIG END) ..... 159 . C
REMOVAL ........................................................ 130 . CONNECTING ROD BUSHING OIL CLEAR-
INSPECTION AFTER REMOVAL .................... 131 . ANCE (SMALL END) ........................................ 159 .
INSTALLATION ................................................ 131 . CYLINDER BLOCK DISTORTION ................... 161 . D
Disassembly and Assembly ................................ 132 . INNER DIAMETER OF MAIN BEARING HOUS-
DISASSEMBLY ................................................ 132 . ING ................................................................... 161
.
ASSEMBLY ...................................................... 133 . PISTON TO CYLINDER BORE CLEARANCE . 161 E
Inspection After Disassembly .............................. 133 . OUTER DIAMETER OF CRANKSHAFT JOUR-
CYLINDER HEAD DISTORTION ..................... 133 . NAL .................................................................. 162
.
VALVE DIMENSIONS ...................................... 134 . OUTER DIAMETER OF CRANKSHAFT PIN ... 162 .
VALVE GUIDE CLEARANCE ........................... 134 . OUT-OF-ROUND AND TAPER OF CRANK- F
VALVE GUIDE REPLACEMENT ...................... 134 . SHAFT .............................................................. 163
.
VALVE SEAT CONTACT .................................. 135 . CRANKSHAFT RUNOUT ................................. 163 .
VALVE SEAT REPLACEMENT ........................ 136 . OIL CLEARANCE OF CONNECTING ROD G
VALVE SPRING SQUARENESS ..................... 137 . BEARING ......................................................... 163 .
VALVE SPRING DIMENSIONS AND VALVE OIL CLEARANCE OF MAIN BEARING ............ 164 .
SPRING PRESSURE LOAD ............................ 137 . CRUSH HEIGHT OF MAIN BEARING ............. 164 . H
ENGINE ASSEMBLY ............................................. 138 . OUTER DIAMETER OF LOWER CYLINDER
Removal and Installation ..................................... 138 . BLOCK MOUNTING BOLT ............................... 164 .
REMOVAL ........................................................ 139 . OUTER DIAMETER OF CONNECTING ROD
I
INSTALLATION ................................................ 141 . BOLT ................................................................ 165
.
INSPECTION AFTER INSTALLATION ............ 141 . MOVEMENT AMOUNT OF FLYWHEEL (M/T
CYLINDER BLOCK ............................................... 142 . MODEL) ........................................................... 165.
Disassembly and Assembly ................................ 142 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 166 . J
DISASSEMBLY ................................................ 143 . Standard and Limit ............................................... 166 .
ASSEMBLY ...................................................... 145 . GENERAL SPECIFICATIONS .......................... 166 .
How to Select Piston and Bearing ....................... 150 . INTAKE MANIFOLD AND EXHAUST MANI- K
DESCRIPTION ................................................. 150 . FOLD ................................................................ 166
.
HOW TO SELECT A PISTON .......................... 151 . DRIVE BELTS .................................................. 166 .
HOW TO SELECT A CONNECTING ROD BEAR- CYLINDER HEAD ............................................ 167 .
L
ING ................................................................... 151
. VALVE .............................................................. 167
.
CAMSHAFT AND CAMSHAFT BEARING ....... 170 .
CYLINDER BLOCK .......................................... 170 .
PISTON, PISTON RING, AND PISTON PIN .... 171 . M
CONNECTING ROD ........................................ 172 .
CRANKSHAFT ................................................. 173 .
MAIN BEARING ............................................... 174 .
CONNECTING ROD BEARING ....................... 175 .
EM-3
PRECAUTIONS
[QG18DE]
PRECAUTIONS PFP:00001
Parts Requiring Angular Tightening EBS0068U
q Use an angle wrench for the final tightening of the following engine parts:
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