Nissan Frontier D40. Instruction — part 586
EM-76
< REMOVAL AND INSTALLATION >
[QR25DE]
ENGINE ASSEMBLY
• Be careful not to damage drive plate or flywheel. Espe-
cially avoid deforming and damaging of signal plate
teeth (circumference position).
• Place the drive plate or flywheel with signal plate sur-
face facing other than downward.
• Keep magnetic materials away from signal plate.
CAUTION:
Use an engine stand that has a load capacity [approximately 240kg (529 lb) or more] large enough
for supporting the engine weight.
• If the load capacity of the stand is not adequate, remove the following parts beforehand to
reduce the potential risk of overturning the stand.
- Remove fuel tube and fuel injector assembly. Refer to
EM-38, "Removal and Installation"
- Remove intake manifold. Refer to
EM-27, "Removal and Installation"
- Remove rocker cover. Refer to
EM-36, "Removal and Installation"
.
- Other removable brackets.
CAUTION:
Before removing the hanging chains, make sure the engine stand is stable and there is no risk of
overturning.
28. Remove generator. Refer to
CHG-20, "Removal and Installation - QR25DE Models"
29. Remove engine mounting insulator bracket (upper) with power tool.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• When replacing an engine or transmission you must make sure the dowels are installed correctly
during reassembly.
• Improper alignment caused by missing dowels may cause vibration, oil leaks or breakage of driv-
etrain components.
• Do not allow engine oil to get on engine mounting insulator. Be careful not to damage engine mounting insu-
lator.
• When installation directions are specified, install parts according to the direction marks on them referring to
the figure of components.
• Make sure that each mounting insulator is seated properly, and tighten nuts and bolts.
INSPECTION AFTER INSTALLATION
• Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are
lower than required quantity, fill to the specified level. Refer to
MA-16, "For North America: Fluids and Lubri-
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel
leakage at the connection points.
• Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oil/fluids including
engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system.
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to
specified level if necessary.
• Summary of the inspection items:
KBIA2491E
ENGINE ASSEMBLY
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< REMOVAL AND INSTALLATION >
[QR25DE]
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* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
Item
Before starting engine
Engine running
After engine stopped
Engine coolant
Level
Leakage
Level
Engine oil
Level
Leakage
Level
Other oils and fluids*
Level
Leakage
Level
Fuel
Leakage
Leakage
Leakage
Exhaust gas
—
Leakage
—
EM-78
< DISASSEMBLY AND ASSEMBLY >
[QR25DE]
ENGINE UNIT
DISASSEMBLY AND ASSEMBLY
ENGINE UNIT
Exploded View
INFOID:0000000005274297
WBIA0837E
ENGINE UNIT
EM-79
< DISASSEMBLY AND ASSEMBLY >
[QR25DE]
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Disassembly and Assembly
INFOID:0000000005274298
DISASSEMBLY
NOTE:
Explained here is how to disassemble with engine stand supporting transmission surface. When using differ-
ent type of engine stand, some steps may be different.
1.
Remove the engine and the transmission assembly from the vehicle, and separate the transmission
assembly from the engine. Refer to
2.
Remove clutch cover and clutch disc (M/T models). Refer to
CL-20, "5M/T : Removal and Installation"
1.
Cylinder block
2.
O-ring
3.
Crankshaft position sensor (POS)
4.
Knock sensor
5.
Oil pressure switch
6.
Water drain plug
7.
Oil level gauge
8.
Oil level gauge guide
9.
O–ring
10. Lower cylinder block
11.
Lower cylinder block mounting bolt
12.
Snap ring
13. Connecting rod
14.
Connecting rod bearing
15.
Connecting rod bearing cap
16. Connecting rod bolt
17.
Piston
18.
Oil ring
19. Second ring
20.
Top ring
21.
Piston pin
22. Thrust bearing
23.
Main bearing upper
24.
Crankshaft
25. Crankshaft key
26.
Main bearing lower
27.
Rear oil seal
28. Pilot convertor (A/T models)
29.
Pilot bushing (M/T models)
30.
Signal plate (type 1)
31. Signal plate (type 2)
32.
Reinforcement plate (A/T models)
33.
Drive plate (A/T models)
34. Flywheel (M/T models)
A.
Refer to
B.
Refer to
C.
Refer to
D.
Refer to
1.
Cylinder block
2.
Gasket
3.
Cylinder block heater
4.
Connector protector cap
PBIC3021E
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