Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Sentra 2000-2005 Approved Nissan Sentra 2003 EM
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B ENGINE
A
EM
SECTION
ENGINE MECHANICAL C
D
E
CONTENTS
QG18DE Removal ................................................................ 40
. F
INSPECTION AFTER REMOVAL ......................... 45 .
PRECAUTIONS ......................................................... 4 . INSTALLATION ..................................................... 45 .
Parts Requiring Angular Tightening ........................ 4 . INSPECTION AFTER INSTALLATION .................. 48 . G
Precautions for Liquid Gasket ................................. 4 . OIL SEAL ................................................................. 49
.
REMOVAL OF LIQUID GASKET SEALING ......... 4 . Replacement ......................................................... 49
.
LIQUID GASKET APPLICATION PROCEDURE 4 ..... VALVE OIL SEAL ............................................... 49 .
Rocker Cover Bolts ................................................. 5 . H
FRONT OIL SEAL .............................................. 49 .
PREPARATION .......................................................... 6 . REAR OIL SEAL ................................................ 51 .
Special Service Tools .............................................. 6 . CYLINDER HEAD .................................................... 52 .
Commercial Service Tools ....................................... 8 . On-Vehicle Service ................................................ 52. I
NOISE, VIBRATION, AND HARSHNESS (NVH) CHECKING COMPRESSION PRESSURE ........ 52 .
TROUBLESHOOTING ............................................. 10 . Removal and Installation ....................................... 53 .
Noise, Vibration and Harshness (NVH) Trouble- REMOVAL .......................................................... 53
. J
shooting ................................................................. 10
. INSTALLATION .................................................. 54 .
NVH TROUBLESHOOTING -- ENGINE NOISE 10 ... Disassembly and Assembly ................................... 56 .
OUTER COMPONENT PARTS ............................... 12 . DISASSEMBLY .................................................. 56 .
Removal and Installation ....................................... 12 . K
ASSEMBLY ........................................................ 57.
OIL PAN ................................................................... 16
. Inspection after Disassembly ................................. 58 .
Components .......................................................... 16
. CYLINDER HEAD DISTORTION ....................... 58 .
Removal ................................................................ 16
. VALVE GUIDE CLEARANCE ............................. 58 . L
Installation ............................................................. 17
. VALVE GUIDE REPLACEMENT ........................ 59 .
FUEL INJECTOR AND FUEL TUBE ....................... 19 . VALVE SEATS .................................................... 60 .
Removal and Installation ....................................... 19 . REPLACING VALVE SEAT FOR SERVICE M
REMOVAL .......................................................... 19. PARTS ................................................................ 60
.
INSTALLATION .................................................. 20 . VALVE DIMENSIONS ......................................... 61 .
INSPECTION AFTER INSTALLATION .............. 22 . VALVE SPRING .................................................. 61 .
ROCKER COVER .................................................... 23 . ENGINE ASSEMBLY ............................................... 63 .
Removal and Installation ....................................... 23 . Removal and Installation ....................................... 63 .
REMOVAL .......................................................... 23. REMOVAL .......................................................... 64
.
INSTALLATION .................................................. 24 . INSTALLATION .................................................. 66 .
CAMSHAFT ............................................................. 26. CYLINDER BLOCK ................................................. 67 .
Removal and Installation ....................................... 26 . Components .......................................................... 67
.
REMOVAL .......................................................... 26. Removal and Installation ....................................... 68 .
INSTALLATION .................................................. 29 . Disassembly .......................................................... 68
.
INSPECTION AFTER REMOVAL ...................... 32 . PISTON AND CRANKSHAFT ............................ 68 .
Valve Clearance .................................................... 35. Inspection .............................................................. 69
.
INSPECTION ..................................................... 35 . PISTON AND PISTON PIN CLEARANCE ......... 69 .
ADJUSTING ....................................................... 36 . PISTON RING SIDE CLEARANCE .................... 70 .
TIMING CHAIN ........................................................ 39 . PISTON RING END GAP ................................... 70 .
Components .......................................................... 39
.
EM-1
CONNECTING ROD BEND AND TORSION ...... 70 . NOISE, VIBRATION, AND HARSHNESS (NVH)
CYLINDER BLOCK DISTORTION AND WEAR... 71 TROUBLESHOOTING .............................................97 .
PISTON-TO-BORE CLEARANCE ...................... 71 . NVH Troubleshooting --Engine Noise ...................97 .
CRANKSHAFT ................................................... 72 . Use the Chart Below to Help You Find the Cause
BEARING CLEARANCE .................................... 73 . of the Symptom. .....................................................98 .
CONNECTING ROD BUSHING CLEARANCE DRIVE BELTS ...........................................................99 .
(SMALL END) ..................................................... 76 . Checking Drive Belts ..............................................99 .
REPLACEMENT OF CONNECTING ROD Tension Adjustment ................................................99 .
BUSHING (SMALL END) ................................... 76 . Removal and Installation ........................................99 .
FLYWHEEL RUNOUT ........................................ 77 . REMOVAL ...........................................................99 .
Assembly ............................................................... 77
. INSTALLATION ...................................................99 .
PISTON .............................................................. 77
. Removal and Installation of Drive Belt Auto-ten-
CRANKSHAFT ................................................... 78 . sioner ................................................................... 100
.
SERVICE DATA AND SPECIFICATIONS (SDS) ..... 81 . REMOVAL ......................................................... 100 .
General Specifications ........................................... 81 . INSTALLATION ................................................. 100 .
Compression Pressure .......................................... 81 . AIR CLEANER AND AIR DUCT ............................ 101 .
Cylinder Head ........................................................ 81. Removal and Installation ...................................... 101 .
Valve ...................................................................... 82
. REMOVAL ......................................................... 101 .
VALVE ................................................................ 82
. INSTALLATION ................................................. 102 .
VALVE SPRING ................................................. 82 . CHANGING THE AIR CLEANER ELEMENT ... 102 .
VALVE LIFTER ................................................... 82 . INTAKE MANIFOLD ............................................... 103 .
VALVE CLEARANCE ......................................... 82 . Removal and Installation ...................................... 103 .
VALVE GUIDE .................................................... 83 . REMOVAL ......................................................... 103 .
AVAILABLE SHIMS ............................................ 83 . INSPECTION AFTER REMOVAL ..................... 105 .
VALVE SEAT ...................................................... 85 . INSTALLATION ................................................. 106 .
VALVE SEAT RESURFACE LIMIT ..................... 86 . INSPECTION AFTER INSTALLATION ............. 107 .
Camshaft and Camshaft Bearing .......................... 86 . EXHAUST MANIFOLD AND THREE WAY CATA-
Cylinder Block ........................................................ 87
. LYST ....................................................................... 108
.
Piston, Piston Ring and Piston Pin ........................ 87 . Removal and Installation ...................................... 108 .
PISTON .............................................................. 87
. REMOVAL ......................................................... 108 .
PISTON RING .................................................... 88 . INSPECTION AFTER REMOVAL ..................... 109 .
PISTON PIN ....................................................... 88 . INSTALLATION ................................................. 109 .
Connecting Rod ..................................................... 88 . OIL PAN AND OIL STRAINER ............................... 110 .
Crankshaft ............................................................. 89
. Removal and Installation ...................................... 110 .
Main Bearing ......................................................... 90. REMOVAL ......................................................... 110 .
STANDARD ........................................................ 90 . INSPECTION AFTER REMOVAL ..................... 111 .
UNDERSIZE ....................................................... 90 . INSTALLATION ................................................. 111 .
Connecting Rod Bearing ....................................... 90 . INSPECTION AFTER INSTALLATION ............. 112 .
STANDARD SIZE ............................................... 90 . IGNITION COIL ...................................................... 113 .
UNDERSIZE ....................................................... 90 . Removal and Installation ...................................... 113 .
Bearing Clearance ................................................. 90 . REMOVAL ......................................................... 113 .
Miscellaneous Components ................................... 90 . INSTALLATION ................................................. 113 .
SPARK PLUG ......................................................... 114 .
QR25DE Removal and Installation ...................................... 114 .
REMOVAL ......................................................... 114 .
PRECAUTIONS ........................................................ 91 . INSPECTION AFTER REMOVAL ..................... 114 .
Precautions for Draining Coolant ........................... 91 . INSTALLATION ................................................. 115 .
Precautions for Disconnecting Fuel Piping ............ 91 . FUEL INJECTOR AND FUEL TUBE ...................... 116 .
Precautions for Removal and Disassembly ........... 91 . Removal and Installation ...................................... 116 .
Precautions for Inspection, Repair and Replace- REMOVAL ......................................................... 116 .
ment ....................................................................... 91
. INSTALLATION ................................................. 117 .
Precautions for Assembly and Installation ............. 91 . INSPECTION AFTER INSTALLATION ............. 118 .
Parts Requiring Angular Tightening ....................... 91 . ROCKER COVER ................................................... 119 .
Precautions for Liquid Gasket ............................... 92 . Removal and Installation ...................................... 119 .
REMOVAL OF LIQUID GASKET SEALING ....... 92 . REMOVAL ......................................................... 119 .
LIQUID GASKET APPLICATION PROCEDURE 92 ... INSTALLATION ................................................. 120 .
PREPARATION ........................................................ 93 . CAMSHAFT ............................................................ 121 .
Special Service Tools ............................................ 93 . Removal and Installation ...................................... 121 .
Commercial Service Tools ..................................... 95 . REMOVAL ......................................................... 121 .
EM-2
INSPECTION AFTER REMOVAL .................... 123 . HOW TO SELECT A CONNECTING ROD BEAR-
INSTALLATION ................................................ 126 . ING ................................................................... 168
. A
Valve Clearance .................................................. 128
. HOW TO SELECT A MAIN BEARING ............. 170 .
INSPECTION ................................................... 128 . Inspection After Disassembly .............................. 173 .
VALVE ADJUSTMENT ..................................... 130 . CRANKSHAFT SIDE CLEARANCE ................. 173 . EM
TIMING CHAIN ...................................................... 132. CONNECTING ROD SIDE CLEARANCE ........ 174 .
Removal and Installation ..................................... 132 . PISTON AND PISTON PIN CLEARANCE ....... 174 .
REMOVAL ........................................................ 133
. PISTON RING SIDE CLEARANCE .................. 175 .
INSPECTION AFTER REMOVAL .................... 135 . PISTON RING END GAP ................................. 175 . C
INSTALLATION ................................................ 136 . CONNECTING ROD BEND AND TORSION ... 175 .
OIL SEAL ............................................................... 140
. CONNECTING ROD BEARING (BIG END) ..... 176 .
Removal and installation of Valve Oil Seal .......... 140 . CONNECTING ROD BUSHING OIL CLEAR- D
REMOVAL ........................................................ 140
. ANCE (SMALL END) ........................................ 176 .
INSTALLATION ................................................ 140 . CYLINDER BLOCK DISTORTION ................... 177 .
Removal and Installation of Front Oil Seal .......... 140 . INNER DIAMETER OF MAIN BEARING HOUS- E
REMOVAL ........................................................ 140
. ING ................................................................... 178
.
INSTALLATION ................................................ 141 . PISTON TO CYLINDER BORE CLEARANCE . 178
Removal and Installation of Rear Oil Seal .......... 142 . OUTER DIAMETER OF CRANKSHAFT MAIN
REMOVAL ........................................................ 142
. JOURNAL ......................................................... 179 . F
INSTALLATION ................................................ 142 . OUTER DIAMETER OF CRANKSHAFT PIN
CYLINDER HEAD .................................................. 143 . JOURNAL ......................................................... 180 .
On-Vehicle Service .............................................. 143. OUT-OF-ROUND AND TAPER OF CRANK- G
CHECKING COMPRESSION PRESSURE ..... 143 . SHAFT .............................................................. 180
.
Removal and Installation ..................................... 145 . CRANKSHAFT RUNOUT ................................. 180 .
REMOVAL ........................................................ 146
. OIL CLEARANCE OF CONNECTING ROD H
INSPECTION AFTER REMOVAL .................... 146 . BEARING ......................................................... 180 .
INSTALLATION ................................................ 146 . OIL CLEARANCE OF MAIN BEARING ............ 181 .
Disassembly and Assembly ................................ 147 . CRUSH HEIGHT OF MAIN BEARING ............. 181 .
I
DISASSEMBLY ................................................ 148 . OUTER DIAMETER OF LOWER CYLINDER
ASSEMBLY ...................................................... 148. BLOCK MOUNTING BOLT ............................... 182 .
Inspection After Disassembly .............................. 149 . OUTER DIAMETER OF CONNECTING ROD
CYLINDER HEAD DISTORTION ..................... 149 . BOLT ................................................................ 182
. J
VALVE DIMENSIONS ...................................... 149 . MOVEMENT AMOUNT OF FLYWHEEL (M/T
VALVE GUIDE CLEARANCE ........................... 150 . MODEL) ........................................................... 182.
VALVE GUIDE REPLACEMENT ...................... 150 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 184 . K
VALVE SEAT CONTACT .................................. 151 . Standard and Limit ............................................... 184 .
VALVE SEAT REPLACEMENT ........................ 151 . GENERAL SPECIFICATIONS .......................... 184 .
VALVE SPRING SQUARENESS ..................... 152 . DRIVE BELTS .................................................. 184 . L
VALVE SPRING DIMENSIONS AND VALVE INTAKE MANIFOLD AND EXHAUST MANI-
SPRING PRESSURE LOAD ............................ 152 . FOLD ................................................................ 184
.
ENGINE ASSEMBLY ............................................. 154 . SPARK PLUG ................................................... 184 .
Removal and Installation ..................................... 154 . CYLINDER HEAD ............................................ 185 . M
REMOVAL ........................................................ 155
. VALVE .............................................................. 185
.
INSTALLATION ................................................ 157 . CAMSHAFT AND CAMSHAFT BEARING ....... 188 .
INSPECTION AFTER INSTALLATION ............ 157 . CYLINDER BLOCK .......................................... 188 .
CYLINDER BLOCK ............................................... 158 . PISTON, PISTON RING, AND PISTON PIN .... 189 .
Disassembly and Assembly ................................ 158 . CONNECTING ROD ........................................ 190 .
DISASSEMBLY ................................................ 159 . CRANKSHAFT ................................................. 191 .
ASSEMBLY ...................................................... 162. MAIN BEARING ............................................... 192 .
How to Select Piston and Bearing ....................... 166 . CONNECTING ROD BEARING ....................... 193 .
DESCRIPTION ................................................. 166 . Miscellaneous Components ................................ 193 .
HOW TO SELECT A PISTON .......................... 167 .
EM-3
PRECAUTIONS
[QG18DE]
PRECAUTIONS PFP:00001
Parts Requiring Angular Tightening EBS00CE6
q Use an angle wrench for the final tightening of the following engine parts:
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