Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Sentra 2000-2005 Approved Nissan Sentra 2004 EM
<< Back | HomeMost service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.
Image preview - the first page of the document
>> Download EM documenatation <<
Text preview - extract from the document
B ENGINE
A
EM
SECTION
ENGINE MECHANICAL C
D
E
CONTENTS
QG18DE INSPECTION AFTER REMOVAL ...................... 33 . F
Valve Clearance .................................................... 35
.
PRECAUTIONS ......................................................... 4 . INSPECTION ..................................................... 35.
Precautions for Draining Coolant ............................ 4 . ADJUSTING ....................................................... 36
. G
Precautions for Disconnecting Fuel Piping ............. 4 . TIMING CHAIN ......................................................... 39
.
Precautions for Removal and Disassembly ............ 4 . Components .......................................................... 39
.
Precautions for Inspection, Repair and Replace- Removal ................................................................ 40
.
ment ........................................................................ 4
. H
INSPECTION AFTER REMOVAL ......................... 45 .
Precautions for Assembly and Installation .............. 4 . INSTALLATION ..................................................... 45.
Parts Requiring Angular Tightening ........................ 4 . INSPECTION AFTER INSTALLATION .................. 48 .
Precautions for Liquid Gasket ................................. 5 . OIL SEAL ................................................................. 49
. I
REMOVAL OF LIQUID GASKET SEALING ......... 5 . Replacement ......................................................... 49
.
LIQUID GASKET APPLICATION PROCEDURE 5 ..... VALVE OIL SEAL ............................................... 49 .
Rocker Cover Bolts ................................................. 6 . FRONT OIL SEAL .............................................. 49 . J
PREPARATION .......................................................... 7 . REAR OIL SEAL ................................................ 51 .
Special Service Tools .............................................. 7 . CYLINDER HEAD .................................................... 52 .
Commercial Service Tools ....................................... 9 . On-Vehicle Service ................................................ 52
.
NOISE, VIBRATION, AND HARSHNESS (NVH) K
CHECKING COMPRESSION PRESSURE ........ 52 .
TROUBLESHOOTING ..............................................11 . Removal and Installation ....................................... 53 .
Noise, Vibration and Harshness (NVH) Trouble- REMOVAL .......................................................... 53
.
shooting ..................................................................11
. INSTALLATION .................................................. 54 . L
NVH TROUBLESHOOTING -- ENGINE NOISE ....11 Disassembly and Assembly ................................... 56 .
OUTER COMPONENT PARTS ............................... 13 . DISASSEMBLY .................................................. 56 .
Removal and Installation ....................................... 13 . ASSEMBLY ........................................................ 57
. M
OIL PAN ................................................................... 16
. Inspection after Disassembly ................................. 58 .
Components .......................................................... 16. CYLINDER HEAD DISTORTION ....................... 58 .
Removal ................................................................ 16
. VALVE GUIDE CLEARANCE ............................. 58 .
Installation ............................................................. 17
. VALVE GUIDE REPLACEMENT ........................ 59 .
FUEL INJECTOR AND FUEL TUBE ....................... 19 . VALVE SEATS .................................................... 60.
Removal and Installation ....................................... 19 . REPLACING VALVE SEAT FOR SERVICE
REMOVAL .......................................................... 19 . PARTS ................................................................ 60
.
INSTALLATION .................................................. 20 . VALVE DIMENSIONS ......................................... 61 .
INSPECTION AFTER INSTALLATION .............. 22 . VALVE SPRING .................................................. 61 .
ROCKER COVER .................................................... 23 . ENGINE ASSEMBLY ............................................... 62 .
Removal and Installation ....................................... 23 . Removal and Installation ....................................... 62 .
REMOVAL .......................................................... 23 . REMOVAL .......................................................... 63
.
INSTALLATION .................................................. 24 . INSTALLATION .................................................. 65 .
CAMSHAFT ............................................................. 26. CYLINDER BLOCK ................................................. 66 .
Removal and Installation ....................................... 26 . Components .......................................................... 66
.
REMOVAL .......................................................... 26 . Removal and Installation ....................................... 67 .
INSTALLATION .................................................. 29 .
EM-1
Disassembly .......................................................... 67. Parts Requiring Angular Tightening .......................91 .
PISTON AND CRANKSHAFT ............................ 67 . Precautions for Liquid Gasket ................................92 .
Inspection .............................................................. 68
. REMOVAL OF LIQUID GASKET SEALING .......92 .
PISTON AND PISTON PIN CLEARANCE ......... 68 . LIQUID GASKET APPLICATION PROCEDURE...92
PISTON RING SIDE CLEARANCE .................... 69 . PREPARATION ........................................................93 .
PISTON RING END GAP ................................... 69 . Special Service Tools .............................................93 .
CONNECTING ROD BEND AND TORSION ...... 69 . Commercial Service Tools .....................................95 .
CYLINDER BLOCK DISTORTION AND WEAR... 70 NOISE, VIBRATION, AND HARSHNESS (NVH)
PISTON-TO-BORE CLEARANCE ...................... 70 . TROUBLESHOOTING .............................................97 .
CRANKSHAFT ................................................... 71 . NVH Troubleshooting --Engine Noise ...................97 .
BEARING CLEARANCE .................................... 72 . Use the Chart Below to Help You Find the Cause
CONNECTING ROD BUSHING CLEARANCE of the Symptom. .....................................................98 .
(SMALL END) ..................................................... 75 . DRIVE BELTS ...........................................................99 .
REPLACEMENT OF CONNECTING ROD Checking Drive Belts ..............................................99 .
BUSHING (SMALL END) ................................... 76 . Tension Adjustment ................................................99 .
FLYWHEEL RUNOUT ........................................ 76 . Removal and Installation ........................................99 .
Assembly ............................................................... 76
. REMOVAL ...........................................................99 .
PISTON .............................................................. 76
. INSTALLATION ...................................................99 .
CRANKSHAFT ................................................... 77 . Removal and Installation of Drive Belt Auto-ten-
SERVICE DATA AND SPECIFICATIONS (SDS) ..... 81 . sioner ................................................................... 100
.
General Specifications ........................................... 81 . REMOVAL ......................................................... 100 .
Compression Pressure .......................................... 81 . INSTALLATION ................................................. 100 .
Cylinder Head ........................................................ 81. AIR CLEANER AND AIR DUCT ............................ 101 .
Valve ...................................................................... 82
. Removal and Installation ...................................... 101 .
VALVE ................................................................. 82
. REMOVAL ......................................................... 101 .
VALVE SPRING .................................................. 82 . INSTALLATION ................................................. 102 .
VALVE LIFTER ................................................... 82 . CHANGING THE AIR CLEANER ELEMENT ... 102 .
VALVE CLEARANCE .......................................... 82 . INTAKE MANIFOLD ............................................... 103 .
VALVE GUIDE .................................................... 83 . Removal and Installation ...................................... 103 .
AVAILABLE SHIMS ............................................ 83 . REMOVAL ......................................................... 103 .
VALVE SEAT ...................................................... 85 . INSPECTION AFTER REMOVAL ..................... 105 .
VALVE SEAT RESURFACE LIMIT ..................... 86 . INSTALLATION ................................................. 106 .
Camshaft and Camshaft Bearing .......................... 86 . INSPECTION AFTER INSTALLATION ............. 107 .
Cylinder Block ........................................................ 87
. EXHAUST MANIFOLD AND THREE WAY CATA-
Piston, Piston Ring and Piston Pin ........................ 87 . LYST ....................................................................... 108
.
PISTON .............................................................. 87
. Removal and Installation ...................................... 108 .
PISTON RING .................................................... 88 . REMOVAL ......................................................... 108 .
PISTON PIN ....................................................... 88 . INSPECTION AFTER REMOVAL ..................... 109 .
Connecting Rod ..................................................... 88 . INSTALLATION ................................................. 109 .
Crankshaft ............................................................. 89
. OIL PAN AND OIL STRAINER ............................... 110 .
Main Bearing ......................................................... 90. Removal and Installation ...................................... 110 .
STANDARD ........................................................ 90 . REMOVAL ......................................................... 110 .
UNDERSIZE ....................................................... 90 . INSPECTION AFTER REMOVAL ..................... 111 .
Connecting Rod Bearing ....................................... 90 . INSTALLATION ................................................. 112 .
STANDARD SIZE ............................................... 90 . INSPECTION AFTER INSTALLATION ............. 112 .
UNDERSIZE ....................................................... 90 . IGNITION COIL ...................................................... 113 .
Bearing Clearance ................................................. 90 . Removal and Installation ...................................... 113 .
Miscellaneous Components ................................... 90 . REMOVAL ......................................................... 113 .
INSTALLATION ................................................. 113 .
QR25DE SPARK PLUG ......................................................... 114 .
Removal and Installation ...................................... 114 .
PRECAUTIONS ........................................................ 91 . REMOVAL ......................................................... 114 .
Precautions for Draining Coolant ........................... 91 . INSPECTION AFTER REMOVAL ..................... 114 .
Precautions for Disconnecting Fuel Piping ............ 91 . INSTALLATION ................................................. 115 .
Precautions for Removal and Disassembly ........... 91 . FUEL INJECTOR AND FUEL TUBE ...................... 116 .
Precautions for Inspection, Repair and Replace- Removal and Installation ...................................... 116 .
ment ....................................................................... 91
. REMOVAL ......................................................... 116 .
Precautions for Assembly and Installation ............. 91 . INSTALLATION ................................................. 117 .
INSPECTION AFTER INSTALLATION ............. 118 .
EM-2
ROCKER COVER ...................................................119 . ASSEMBLY ...................................................... 162 .
Removal and Installation ......................................119 . How to Select Piston and Bearing ....................... 167 . A
REMOVAL .........................................................119
. DESCRIPTION ................................................. 167 .
INSTALLATION ................................................ 120 . HOW TO SELECT A PISTON .......................... 168 .
CAMSHAFT ........................................................... 121
. HOW TO SELECT A CONNECTING ROD BEAR- EM
Removal and Installation ..................................... 121 . ING ................................................................... 169
.
REMOVAL ........................................................ 121
. HOW TO SELECT A MAIN BEARING ............. 171 .
INSPECTION AFTER REMOVAL .................... 123 . Inspection After Disassembly .............................. 174 .
INSTALLATION ................................................ 126 . CRANKSHAFT SIDE CLEARANCE ................. 174 . C
Valve Clearance .................................................. 128
. CONNECTING ROD SIDE CLEARANCE ........ 175 .
INSPECTION ................................................... 128 . PISTON AND PISTON PIN CLEARANCE ....... 175 .
VALVE ADJUSTMENT ..................................... 129 . PISTON RING SIDE CLEARANCE .................. 176 . D
TIMING CHAIN ...................................................... 131. PISTON RING END GAP ................................. 176 .
Removal and Installation ..................................... 131 . CONNECTING ROD BEND AND TORSION ... 177 .
REMOVAL ........................................................ 132
. CONNECTING ROD BEARING (BIG END) ..... 177 . E
INSPECTION AFTER REMOVAL .................... 134 . CONNECTING ROD BUSHING OIL CLEAR-
INSTALLATION ................................................ 135 . ANCE (SMALL END) ........................................ 177 .
OIL SEAL ............................................................... 139
. CYLINDER BLOCK DISTORTION ................... 178 .
Removal and installation of Valve Oil Seal .......... 139 . INNER DIAMETER OF MAIN BEARING HOUS- F
REMOVAL ........................................................ 139
. ING ................................................................... 178
.
INSTALLATION ................................................ 139 . PISTON TO CYLINDER BORE CLEARANCE . 179
Removal and Installation of Front Oil Seal .......... 139 . OUTER DIAMETER OF CRANKSHAFT MAIN G
REMOVAL ........................................................ 139
. JOURNAL ......................................................... 180 .
INSTALLATION ................................................ 140 . OUTER DIAMETER OF CRANKSHAFT PIN
Removal and Installation of Rear Oil Seal .......... 141 . JOURNAL ......................................................... 180 . H
REMOVAL ........................................................ 141
. OUT-OF-ROUND AND TAPER OF CRANK-
INSTALLATION ................................................ 141 . SHAFT .............................................................. 181
.
CYLINDER HEAD .................................................. 143 . CRANKSHAFT RUNOUT ................................. 181 .
I
On-Vehicle Service .............................................. 143. OIL CLEARANCE OF CONNECTING ROD
CHECKING COMPRESSION PRESSURE ..... 143 . BEARING ......................................................... 181 .
Removal and Installation ..................................... 145 . OIL CLEARANCE OF MAIN BEARING ............ 182 .
REMOVAL ........................................................ 146
. CRUSH HEIGHT OF MAIN BEARING ............. 182 . J
INSPECTION AFTER REMOVAL .................... 146 . OUTER DIAMETER OF LOWER CYLINDER
INSTALLATION ................................................ 146 . BLOCK MOUNTING BOLT ............................... 182 .
Disassembly and Assembly ................................ 148 . OUTER DIAMETER OF CONNECTING ROD K
DISASSEMBLY ................................................ 148 . BOLT ................................................................ 183
.
ASSEMBLY ...................................................... 149. MOVEMENT AMOUNT OF FLYWHEEL (M/T
Inspection After Disassembly .............................. 150 . MODEL) ........................................................... 183. L
CYLINDER HEAD DISTORTION ..................... 150 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 184 .
VALVE DIMENSIONS ...................................... 150 . Standard and Limit ............................................... 184 .
VALVE GUIDE CLEARANCE ........................... 150 . GENERAL SPECIFICATIONS .......................... 184 .
VALVE GUIDE REPLACEMENT ...................... 151 . DRIVE BELTS .................................................. 184 . M
VALVE SEAT CONTACT .................................. 152 . INTAKE MANIFOLD AND EXHAUST MANI-
VALVE SEAT REPLACEMENT ........................ 152 . FOLD ................................................................ 184
.
VALVE SPRING SQUARENESS ..................... 153 . SPARK PLUG ................................................... 184 .
VALVE SPRING DIMENSIONS AND VALVE CYLINDER HEAD ............................................ 185 .
SPRING PRESSURE LOAD ............................ 154 . VALVE .............................................................. 185
.
ENGINE ASSEMBLY ............................................. 155 . CAMSHAFT AND CAMSHAFT BEARING ....... 188 .
Removal and Installation ..................................... 155 . CYLINDER BLOCK .......................................... 188 .
REMOVAL ........................................................ 156
. PISTON, PISTON RING, AND PISTON PIN .... 189 .
INSTALLATION ................................................ 158 . CONNECTING ROD ........................................ 190 .
INSPECTION AFTER INSTALLATION ............ 158 . CRANKSHAFT ................................................. 191 .
CYLINDER BLOCK ............................................... 159 . MAIN BEARING ............................................... 192 .
Disassembly and Assembly ................................ 159 . CONNECTING ROD BEARING ....................... 193 .
DISASSEMBLY ................................................ 160 . Miscellaneous Components ................................ 193 .
EM-3
PRECAUTIONS
[QG18DE]
PRECAUTIONS PFP:00001
Precautions for Draining Coolant EBS00GJK
q Drain coolant when engine is cooled.
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.
q After disconnecting pipes, plug openings to stop fuel leakage.
Precautions for Removal and Disassembly EBS00GJM
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.
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
opposite, and so on. If the order of loosening is specified, follow the specifications.
Precautions for Inspection, Repair and Replacement EBS00GJN
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
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-
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
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.
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.
q After repairing, start engine and increase engine speed to check coolant, fuel, oil, and exhaust systems
for leakage or rattles.
Parts Requiring Angular Tightening EBS00GJP
q Use an angle wrench for the final tightening of the following engine parts.
◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo