Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti QX4 R50 1997-1998.2001 Approved QX4-R50-2001 em
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ENGINE MECHANICAL GI
SECTION EM MA
LC
EC
CONTENTS FE
PRECAUTIONS ...............................................................3 CAMSHAFT SPROCKET RUNOUT ...........................43
AT
Parts Requiring Angular Tightening.............................3 VALVE GUIDE CLEARANCE ....................................43
Liquid Gasket Application Procedure ..........................3 VALVE GUIDE REPLACEMENT ................................44
TF
PREPARATION ...............................................................4 VALVE SEATS .........................................................45
REPLACING VALVE SEAT FOR SERVICE PARTS ....45
Special Service Tools ..................................................4
VALVE DIMENSIONS ...............................................46
Commercial Service Tools ...........................................6 PD
VALVE SPRING .......................................................46
NOISE, VIBRATION AND HARSHNESS (NVH)
VALVE LIFTER ........................................................46
TROUBLESHOOTING .....................................................8 Assembly ...................................................................47
NVH Troubleshooting - Engine Noise .........................9
AX
Installation..................................................................47
OUTER COMPONENT PARTS .....................................10 Valve Clearance.........................................................52
Removal and Installation ...........................................10 CHECKING .............................................................52 SU
TIGHTENING PROCEDURES ...................................12 ADJUSTING ............................................................54
MEASUREMENT OF COMPRESSION PRESSURE ....14 ENGINE ASSEMBLY.....................................................57
OIL PAN.........................................................................15 Removal and Installation ...........................................57 BR
Components...............................................................15 REMOVAL ...............................................................58
Removal.....................................................................15 INSTALLATION........................................................60
Installation..................................................................18 CYLINDER BLOCK .......................................................61 ST
TIMING CHAIN ..............................................................20 Components...............................................................61
Components...............................................................20 CYLINDER BLOCK HEATER ....................................62
POSITION FOR APPLYING LIQUID GASKET ............21
RS
Removal and Installation ...........................................62
Removal.....................................................................23 Disassembly...............................................................62
Inspection...................................................................29 PISTON, CRANKSHAFT AND OIL JET ......................62 BT
Installation..................................................................29 Inspection...................................................................63
OIL SEAL.......................................................................35 PISTON AND PISTON PIN CLEARANCE ..................63
Replacement..............................................................35 PISTON RING SIDE CLEARANCE ............................64 HA
VALVE OIL SEAL .....................................................35 PISTON RING END GAP..........................................64
OIL SEAL INSTALLATION DIRECTION .....................36 CONNECTING ROD BEND AND TORSION ...............65
FRONT OIL SEAL ....................................................36 CYLINDER BLOCK DISTORTION AND WEAR ...........65 SC
REAR OIL SEAL ......................................................36 PISTON-TO-BORE CLEARANCE ..............................66
CYLINDER HEAD..........................................................38 CRANKSHAFT.........................................................67
Components...............................................................38 BEARING CLEARANCE ...........................................67 EL
Removal.....................................................................39 CONNECTING ROD BUSHING CLEARANCE
(SMALL END) ..........................................................70
Disassembly...............................................................41
DRIVE PLATE RUNOUT ..........................................70 IDX
Inspection...................................................................42
Assembly ...................................................................71
CYLINDER HEAD DISTORTION ...............................42
PISTON ..................................................................71
CAMSHAFT VISUAL CHECK ....................................42
OIL JET ..................................................................71
CAMSHAFT RUNOUT ..............................................42
CRANKSHAFT.........................................................71
CAMSHAFT CAM HEIGHT .......................................42
REPLACEMENT OF PILOT CONVERTER .................74
CAMSHAFT JOURNAL CLEARANCE ........................42
DRIVE PLATE .........................................................74
CAMSHAFT END PLAY............................................43
CONTENTS (Cont'd)
SERVICE DATA AND SPECIFICATIONS (SDS) .........75 Piston, Piston Ring and Piston Pin ...........................82
General Specifications...............................................75 AVAILABLE PISTON ................................................82
Compression Pressure ..............................................75 PISTON RING .........................................................83
Cylinder Head ............................................................75 PISTON PIN ............................................................83
Valve ..........................................................................76 Connecting Rod .........................................................83
VALVE ....................................................................76 Crankshaft..................................................................84
VALVE CLEARANCE................................................76 Available Main Bearing..............................................85
AVAILABLE SHIMS ..................................................76 UNDERSIZE ............................................................85
VALVE SPRING .......................................................78 Available Connecting Rod Bearing............................86
VALVE LIFTER ........................................................78 CONNECTING ROD BEARING .................................86
VALVE GUIDE .........................................................79 UNDERSIZE ............................................................86
Valve Seat..................................................................79 Miscellaneous Components.......................................86
Camshaft and Camshaft Bearing ..............................80 BEARING CLEARANCE ...........................................86
Cylinder Block............................................................81
EM-2
PRECAUTIONS
Parts Requiring Angular Tightening
Parts Requiring Angular Tightening NBEM0001
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