Nissan Frontier D40. Manual — part 619
EM-208
< ON-VEHICLE REPAIR >
[VQ40DE]
CYLINDER HEAD
2.
Ream cylinder head recess diameter for service valve seat.
• Be sure to ream in circles concentric to valve guide center.
This will enable valve to fit correctly.
3.
Heat cylinder head to 110
°
to 130
°
C (230
°
to 266
°
F) by soaking
in heated oil.
4.
Provide valve seats cooled well with dry ice. Force fit valve seat into cylinder head.
WARNING:
• Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
CAUTION:
• Avoid directly touching cold valve seats.
5.
Finish seat to the specified dimensions using suitable tool. Refer
to
.
CAUTION:
When using valve seat cutter, firmly grip cutter handle with
both hands. Then, press on the contacting surface all
around the circumference to cut in a single drive. Improper
pressure on with cutter or cutting many different times may
result in staged valve seat.
6.
Using compound, grind to adjust valve fitting.
7.
Check again for normal contact.
VALVE SPRING SQUARENESS
• Set try square along the side of valve spring and rotate spring.
Measure the maximum clearance between the top face of spring
and try square.
• If it exceeds the limit, replace valve spring.
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD
Oversize [0.5 mm (0.020 in)]
Intake
: 38.500 - 38.516 mm (1.5157 - 1.5164 in)
Exhaust
: 32.700 - 32.716 mm (1.2874 - 1.2880 in)
SEM795A
SEM008A
SEM934C
Limit
: 2.1 mm (0.083 in)
PBIC0080E
CYLINDER HEAD
EM-209
< ON-VEHICLE REPAIR >
[VQ40DE]
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• Check valve spring pressure at the specified spring height.
• If the installation load or load with valve open is out of the standard, replace valve spring.
Standard:
Intake and exhaust
Free height
: 47.07 mm (1.8531 in)
Installation height
: 37.00 mm (1.4567 in)
Installation load
: 166 - 188 N (16.9 - 19.2 kg, 37 - 42 lb)
Height during valve open
: 27.20 mm (1.0709 in)
Load with valve open
: 373 - 421 N (38.0 - 42.9 kg, 84 - 95 lb)
SEM113
EM-210
< REMOVAL AND INSTALLATION >
[VQ40DE]
ENGINE ASSEMBLY
REMOVAL AND INSTALLATION
ENGINE ASSEMBLY
Exploded View
INFOID:0000000005274356
Removal and Installation
INFOID:0000000005274357
WARNING:
• Situate vehicle on a flat and solid surface.
• Place chocks at front and back of rear wheels.
• For engines not equipped with engine slingers, attach proper slingers and bolts described in PARTS
CATALOG.
1.
Rear engine mounting insulator 4WD
2. Rear engine mounting insulator 2WD
3.
LH engine mounting bracket (upper)
4.
LH heat shield plate
5. LH engine mounting insulator
6.
LH engine mounting bracket (lower)
7.
RH engine mounting bracket (lower)
8. RH engine mounting insulator
9.
RH heat shield plate
10. RH engine mounting bracket (upper)
AWBIA0721GB
ENGINE ASSEMBLY
EM-211
< REMOVAL AND INSTALLATION >
[VQ40DE]
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CAUTION:
• Always be careful to work safely, avoid forceful or uninstructed operations.
• Do not start working until exhaust system and engine coolant are cooled sufficiently.
• If items or work required are not covered by the engine section, follow the procedures in the applica-
ble sections.
• Always use the support point specified for lifting.
• Use either 2-point lift type or separate type lift. If board-on type is used for unavoidable reasons,
support at the rear axle jacking point with transmission jack or similar tool before starting work, in
preparation for the backward shift of center of gravity.
• For supporting points for lifting and jacking point at rear axle, refer to
REMOVAL
Preparation
1.
Remove front and rear engine under covers, if equipped. Refer to
EXT-13, "Removal and Installation"
.
2.
Drain engine oil. Refer to
3.
Remove engine oil filter.
4.
Drain engine coolant. Refer to
CO-39, "Changing Engine Coolant"
5.
Partially drain A/T fluid. Refer to
TM-263, "Changing the A/T Fluid (ATF)"
6.
Remove the front wheels and tires. Refer to
.
7.
Remove the front fender protectors. Refer to
EXT-20, "Removal and Installation"
.
8.
Release fuel pressure. Refer to
.
9.
Remove the engine hood. Refer to
DLK-127, "Removal and Installation of Hood Assembly"
10. Disconnect the battery negative terminal. Refer to
PG-84, "Removal and Installation"
11. Remove engine room cover. Refer to
EM-138, "Removal and Installation"
.
12. Remove the air duct and resonator assembly and air cleaner case assembly. Refer to
13. Disconnect vacuum hose between vehicle and engine and set it aside.
14. Remove the radiator assembly and hoses. Refer to
CO-43, "Removal and Installation"
.
15. Remove the drive belt. Refer to
EM-127, "Removal and Installation"
.
16. Remove the engine cooling fan. Refer to
CO-46, "Removal and Installation (Crankshaft driven type)"
17. Disconnect the engine room harness from the engine side and set it aside.
18. Disconnect the engine harness grounds.
19. Disconnect the reservoir tank for power steering from engine and move it aside.
20. Disconnect power steering oil pump from engine. Move it from its location and secure with a rope. Refer to
ST-18, "Removal and Installation"
.
21. Remove the A/C compressor bolts and set aside. Refer to
HA-28, "Removal and Installation for Compres-
.
22. Disconnect brake booster vacuum line.
23. Disconnect EVAP line.
24. Disconnect the fuel hose at the engine side connection. Refer to
EM-159, "Removal and Installation"
25. Disconnect the heater hoses at cowl, and install plugs to avoid leakage of engine coolant.
26. Remove the A/T oil level indicator and indicator tube.
27. Remove front final drive assembly (4WD models). Refer to
DLN-190, "Removal and Installation"
.
28. Remove three way catalyst. Refer to
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