Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Sentra 2000-2005 Approved Nissan Sentra 2005 EM
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B ENGINE
A
EM
SECTION
ENGINE MECHANICAL C
D
E
CONTENTS
QG18DE REMOVAL .......................................................... 28
. F
INSTALLATION .................................................. 31 .
PRECAUTIONS ......................................................... 5 . INSPECTION AFTER REMOVAL ...................... 35 .
Precautions for Draining Coolant ............................ 5 . Inspection After Installation ................................... 37 . G
Precautions for Disconnecting Fuel Piping ............. 5 . INSPECTION OF CAMSHAFT SPROCKET
Precautions for Removal and Disassembly ............ 5 . (INT) OIL GROOVE ............................................ 37 .
Precautions for Inspection, Repair and Replace- Valve Clearance .................................................... 38
.
ment ........................................................................ 5
. H
INSPECTION ..................................................... 38.
Precautions for Assembly and Installation .............. 5 . ADJUSTING ....................................................... 39
.
Parts Requiring Angular Tightening ........................ 5 . TIMING CHAIN ......................................................... 42
.
Precautions for Liquid Gasket ................................. 6 . Components .......................................................... 42
. I
REMOVAL OF LIQUID GASKET SEALING ......... 6 . Removal ................................................................ 43
.
LIQUID GASKET APPLICATION PROCEDURE 6 ..... INSPECTION AFTER REMOVAL ......................... 48 .
Rocker Cover Bolts ................................................. 7 . INSTALLATION ..................................................... 48. J
PREPARATION .......................................................... 8 . INSPECTION AFTER INSTALLATION .................. 51 .
Special Service Tools .............................................. 8 . OIL SEAL ................................................................. 52
.
Commercial Service Tools ......................................11 . Replacement ......................................................... 52
.
NOISE, VIBRATION, AND HARSHNESS (NVH) K
VALVE OIL SEAL ............................................... 52 .
TROUBLESHOOTING ............................................. 13 . FRONT OIL SEAL .............................................. 52 .
Noise, Vibration and Harshness (NVH) Trouble- REAR OIL SEAL ................................................ 54 .
shooting ................................................................. 13
. CYLINDER HEAD .................................................... 55 . L
NVH TROUBLESHOOTING -- ENGINE NOISE 13 ... On-Vehicle Service ................................................ 55
.
OUTER COMPONENT PARTS ............................... 15 . CHECKING COMPRESSION PRESSURE ........ 55 .
Removal and Installation ....................................... 15 . Removal and Installation ....................................... 56 . M
OIL PAN ................................................................... 18
. REMOVAL .......................................................... 56
.
Components .......................................................... 18. INSTALLATION .................................................. 57 .
Removal ................................................................ 18
. Disassembly and Assembly ................................... 59 .
Installation ............................................................. 19
. DISASSEMBLY .................................................. 59 .
FUEL INJECTOR AND FUEL TUBE ....................... 21 . ASSEMBLY ........................................................ 60
.
Removal and Installation ....................................... 21 . Inspection after Disassembly ................................. 61 .
REMOVAL .......................................................... 21 . CYLINDER HEAD DISTORTION ....................... 61 .
INSTALLATION .................................................. 22 . VALVE GUIDE CLEARANCE ............................. 61 .
INSPECTION AFTER INSTALLATION .............. 24 . VALVE GUIDE REPLACEMENT ........................ 62 .
ROCKER COVER .................................................... 25 . VALVE SEATS .................................................... 63.
Removal and Installation ....................................... 25 . REPLACING VALVE SEAT FOR SERVICE
REMOVAL .......................................................... 25 . PARTS ................................................................ 63
.
INSTALLATION .................................................. 26 . VALVE DIMENSIONS ......................................... 64 .
CAMSHAFT ............................................................. 28. VALVE SPRING .................................................. 64 .
Removal and Installation ....................................... 28 .
Revision: July 2005 EM-1 2005 Sentra
ENGINE ASSEMBLY ............................................... 65 . QR25DE
Removal and Installation ....................................... 65 .
REMOVAL .......................................................... 66 . PRECAUTIONS ........................................................94 .
INSTALLATION ................................................... 68 . Precautions for Draining Coolant ...........................94 .
INSPECTION AFTER INSTALLATION ............... 68 . Precautions for Disconnecting Fuel Piping ............94 .
CYLINDER BLOCK .................................................. 69 . Precautions for Removal and Disassembly ...........94 .
Components .......................................................... 69 . Precautions for Inspection, Repair and Replace-
Removal and Installation ....................................... 70 . ment .......................................................................94
.
Disassembly .......................................................... 70. Precautions for Assembly and Installation .............94 .
PISTON AND CRANKSHAFT ............................ 70 . Parts Requiring Angular Tightening .......................94 .
Inspection .............................................................. 71
. Precautions for Liquid Gasket ................................95 .
PISTON AND PISTON PIN CLEARANCE ......... 71 . REMOVAL OF LIQUID GASKET SEALING .......95 .
PISTON RING SIDE CLEARANCE .................... 72 . LIQUID GASKET APPLICATION PROCEDURE...95
PISTON RING END GAP ................................... 72 . PREPARATION ........................................................96 .
CONNECTING ROD BEND AND TORSION ...... 72 . Special Service Tools .............................................96 .
CYLINDER BLOCK DISTORTION AND WEAR... 73 Commercial Service Tools .....................................99 .
PISTON-TO-BORE CLEARANCE ...................... 73 . NOISE, VIBRATION, AND HARSHNESS (NVH)
CRANKSHAFT ................................................... 74 . TROUBLESHOOTING ........................................... 101 .
BEARING CLEARANCE .................................... 75 . NVH Troubleshooting --Engine Noise ................. 101 .
CONNECTING ROD BUSHING CLEARANCE Use the Chart Below to Help You Find the Cause
(SMALL END) ..................................................... 78 . of the Symptom. ................................................... 102 .
REPLACEMENT OF CONNECTING ROD DRIVE BELTS ......................................................... 103 .
BUSHING (SMALL END) ................................... 79 . Checking Drive Belts ............................................ 103 .
FLYWHEEL RUNOUT ........................................ 79 . Tension Adjustment .............................................. 103 .
Assembly ............................................................... 79
. Removal and Installation ...................................... 103 .
PISTON .............................................................. 79
. REMOVAL ......................................................... 103 .
CRANKSHAFT ................................................... 80 . INSTALLATION ................................................. 104 .
SERVICE DATA AND SPECIFICATIONS (SDS) ..... 84 . Removal and Installation of Drive Belt Auto-ten-
General Specifications ........................................... 84 . sioner ................................................................... 104
.
Compression Pressure .......................................... 84 . REMOVAL ......................................................... 104 .
Cylinder Head ........................................................ 84. INSTALLATION ................................................. 104 .
Valve ...................................................................... 85
. AIR CLEANER AND AIR DUCT ............................ 106 .
VALVE ................................................................. 85
. Removal and Installation ...................................... 106 .
VALVE SPRING .................................................. 85 . REMOVAL ......................................................... 106 .
VALVE LIFTER ................................................... 85 . INSTALLATION ................................................. 107 .
VALVE CLEARANCE .......................................... 85 . CHANGING THE AIR CLEANER ELEMENT ... 107 .
VALVE GUIDE .................................................... 86 . INTAKE MANIFOLD ............................................... 108 .
AVAILABLE SHIMS ............................................ 86 . Removal and Installation ...................................... 108 .
VALVE SEAT ...................................................... 88 . REMOVAL ......................................................... 108 .
VALVE SEAT RESURFACE LIMIT ..................... 89 . INSPECTION AFTER REMOVAL ..................... 110 .
Camshaft and Camshaft Bearing .......................... 89 . INSTALLATION ................................................. 111 .
Cylinder Block ........................................................ 90
. INSPECTION AFTER INSTALLATION ............. 112 .
Piston, Piston Ring and Piston Pin ........................ 90 . EXHAUST MANIFOLD AND THREE WAY CATA-
PISTON .............................................................. 90
. LYST ....................................................................... 113
.
PISTON RING .................................................... 91 . Removal and Installation ...................................... 113 .
PISTON PIN ....................................................... 91 . REMOVAL ......................................................... 113 .
Connecting Rod ..................................................... 91 . INSPECTION AFTER REMOVAL ..................... 114 .
Crankshaft ............................................................. 92
. INSTALLATION ................................................. 114 .
Main Bearing ......................................................... 93. OIL PAN AND OIL STRAINER ............................... 115 .
STANDARD ........................................................ 93 . Removal and Installation ...................................... 115 .
UNDERSIZE ....................................................... 93 . REMOVAL ......................................................... 115 .
Connecting Rod Bearing ....................................... 93 . INSPECTION AFTER REMOVAL ..................... 116 .
STANDARD SIZE ............................................... 93 . INSTALLATION ................................................. 117 .
UNDERSIZE ....................................................... 93 . INSPECTION AFTER INSTALLATION ............. 117 .
Bearing Clearance ................................................. 93 . IGNITION COIL ...................................................... 118 .
Miscellaneous Components ................................... 93 . Removal and Installation ...................................... 118 .
REMOVAL ......................................................... 118 .
INSTALLATION ................................................. 118 .
Revision: July 2005 EM-2 2005 Sentra
SPARK PLUG .........................................................119. SPRING PRESSURE LOAD ............................ 158 .
Removal and Installation ......................................119 . ENGINE ASSEMBLY ............................................. 159 . A
REMOVAL .........................................................119
. Removal and Installation ..................................... 159 .
INSPECTION AFTER REMOVAL .....................119 . REMOVAL ........................................................ 160 .
INSTALLATION ................................................ 120 . INSTALLATION ................................................ 162 . EM
FUEL INJECTOR AND FUEL TUBE ..................... 121 . INSPECTION AFTER INSTALLATION ............. 162 .
Removal and Installation ..................................... 121 . CYLINDER BLOCK ............................................... 164 .
REMOVAL ........................................................ 121
. Disassembly and Assembly ................................. 164 .
INSTALLATION ................................................ 122 . DISASSEMBLY ................................................ 165 . C
INSPECTION AFTER INSTALLATION ............ 123 . ASSEMBLY ...................................................... 167 .
ROCKER COVER .................................................. 124 . How to Select Piston and Bearing ....................... 172 .
Removal and Installation ..................................... 124 . DESCRIPTION ................................................. 172 . D
REMOVAL ........................................................ 124
. HOW TO SELECT A PISTON .......................... 173 .
INSTALLATION ................................................ 125 . HOW TO SELECT A CONNECTING ROD BEAR-
CAMSHAFT ........................................................... 126
. ING ................................................................... 174
. E
Removal and Installation ..................................... 126 . HOW TO SELECT A MAIN BEARING ............. 176 .
REMOVAL ........................................................ 126
. Inspection After Disassembly .............................. 179 .
INSPECTION AFTER REMOVAL .................... 128 . CRANKSHAFT SIDE CLEARANCE ................. 179 .
INSTALLATION ................................................ 131 . CONNECTING ROD SIDE CLEARANCE ........ 180 . F
Inspection After Installation ................................. 133 . PISTON AND PISTON PIN CLEARANCE ....... 180 .
INSPECTION OF CAMSHAFT SPROCKET PISTON RING SIDE CLEARANCE .................. 181 .
(INT) OIL GROOVE ......................................... 133 . PISTON RING END GAP ................................. 181 . G
Valve Clearance .................................................. 134
. CONNECTING ROD BEND AND TORSION ... 182 .
INSPECTION ................................................... 134 . CONNECTING ROD BEARING (BIG END) ..... 182 .
VALVE ADJUSTMENT ..................................... 135 . CONNECTING ROD BUSHING OIL CLEAR- H
TIMING CHAIN ...................................................... 136. ANCE (SMALL END) ........................................ 182 .
Removal and Installation ..................................... 136 . CYLINDER BLOCK DISTORTION ................... 183 .
REMOVAL ........................................................ 137
. INNER DIAMETER OF MAIN BEARING HOUS-
I
INSPECTION AFTER REMOVAL .................... 139 . ING ................................................................... 183
.
INSTALLATION ................................................ 140 . PISTON TO CYLINDER BORE CLEARANCE . 184
OIL SEAL ............................................................... 144
. OUTER DIAMETER OF CRANKSHAFT MAIN
Removal and installation of Valve Oil Seal .......... 144 . JOURNAL ......................................................... 185 . J
REMOVAL ........................................................ 144
. OUTER DIAMETER OF CRANKSHAFT PIN
INSTALLATION ................................................ 144 . JOURNAL ......................................................... 185 .
Removal and Installation of Front Oil Seal .......... 144 . OUT-OF-ROUND AND TAPER OF CRANK- K
REMOVAL ........................................................ 144
. SHAFT .............................................................. 186
.
INSTALLATION ................................................ 145 . CRANKSHAFT RUNOUT ................................. 186 .
Removal and Installation of Rear Oil Seal .......... 146 . OIL CLEARANCE OF CONNECTING ROD L
REMOVAL ........................................................ 146
. BEARING ......................................................... 186 .
INSTALLATION ................................................ 146 . OIL CLEARANCE OF MAIN BEARING ............ 187 .
CYLINDER HEAD .................................................. 148 . CRUSH HEIGHT OF MAIN BEARING ............. 187 .
On-Vehicle Service .............................................. 148. OUTER DIAMETER OF LOWER CYLINDER M
CHECKING COMPRESSION PRESSURE ..... 148 . BLOCK MOUNTING BOLT ............................... 187 .
Removal and Installation ..................................... 149 . OUTER DIAMETER OF CONNECTING ROD
REMOVAL ........................................................ 150
. BOLT ................................................................ 188
.
INSPECTION AFTER REMOVAL .................... 150 . MOVEMENT AMOUNT OF FLYWHEEL (M/T
INSTALLATION ................................................ 151 . MODEL) ........................................................... 188.
Disassembly and Assembly ................................ 152 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 189 .
DISASSEMBLY ................................................ 152 . Standard and Limit ............................................... 189 .
ASSEMBLY ...................................................... 153. GENERAL SPECIFICATIONS .......................... 189 .
Inspection After Disassembly .............................. 154 . DRIVE BELTS .................................................. 189 .
CYLINDER HEAD DISTORTION ..................... 154 . INTAKE MANIFOLD AND EXHAUST MANI-
VALVE DIMENSIONS ...................................... 154 . FOLD ................................................................ 189
.
VALVE GUIDE CLEARANCE ........................... 154 . SPARK PLUG ................................................... 189 .
VALVE GUIDE REPLACEMENT ...................... 155 . CYLINDER HEAD ............................................ 190 .
VALVE SEAT CONTACT .................................. 156 . VALVE .............................................................. 190
.
VALVE SEAT REPLACEMENT ........................ 156 . CAMSHAFT AND CAMSHAFT BEARING ....... 193 .
VALVE SPRING SQUARENESS ..................... 157 . CYLINDER BLOCK .......................................... 193 .
VALVE SPRING DIMENSIONS AND VALVE PISTON, PISTON RING, AND PISTON PIN .... 194 .
Revision: July 2005 EM-3 2005 Sentra
CONNECTING ROD ........................................ 195. CONNECTING ROD BEARING ........................ 198 .
CRANKSHAFT ................................................. 196
. Miscellaneous Components ................................. 198
.
MAIN BEARING ............................................... 197
.
Revision: July 2005 EM-4 2005 Sentra
PRECAUTIONS
[QG18DE]
PRECAUTIONS PFP:00001
A
Precautions for Draining Coolant EBS00GJK
q Drain coolant when engine is cooled.
EM
Precautions for Disconnecting Fuel Piping EBS00GJL
q Before starting work, make sure no fire or spark producing items are in the work area.
q Release fuel pressure before any removal or disassembly. C
q After disconnecting pipes, plug openings to stop fuel leakage.
Precautions for Removal and Disassembly EBS00GJM
D
q When instructed to use special service tools, use the specified tools. Always be careful to work safely,
avoid forceful operations.
q Use maximum care to avoid damage to mating or sliding surfaces. E
q Cover openings of engine system with tape or equivalent, if necessary, to seal out foreign materials.
q Mark and arrange disassembly parts in an organized way for easy troubleshooting and assembly.
q 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, follow the specifications.
Precautions for Inspection, Repair and Replacement EBS00GJN
G
q Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way,
and replace if necessary.
Precautions for Assembly and Installation EBS00GJO H
q Use torque wrench to tighten bolts or nuts.
q When tightening nuts and bolts, as a basic rule, equally tighten in several different steps starting with the
ones in center, then ones on inside and outside diagonally in this order. If the order of tightening is speci- I
fied, follow the specifications.
q Always replace the old with a new gasket, packing, oil seal or O-ring.
q Thoroughly wash, clean, and air-blow each part. Carefully check oil or coolant passages for any restriction J
and blockage.
q Avoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust.
Before assembly, oil sliding surfaces well. K
q Bleed the air trapped within the system after draining the coolant.
q Before starting engine, apply fuel pressure to fuel lines with turning ignition switch ON (with engine
stopped). Then make sure that there are no leaks at fuel line connections. L
q After repairing, start engine and increase engine speed to check coolant, fuel, oil, and exhaust systems
for leakage or rattles.
M
Parts Requiring Angular Tightening EBS00GJP
q Use an angle wrench for the final tightening of the following engine parts.
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