Nissan Frontier D40. Manual — part 573
EM-24
< ON-VEHICLE MAINTENANCE >
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COMPRESSION PRESSURE
• If compression pressure is below minimum value, check valve clearances and parts associated with
combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure the compression pressure again.
• If some cylinders have low compression pressure, pour small amount of engine oil into the spark plug
hole of the cylinder to re-check it for compression.
• If the added engine oil improves the compression, piston rings may be worn out or damaged. Check pis-
ton rings and replace if necessary.
• If the compression pressure remains at low level despite the addition of engine oil, valves may be mal-
functioning. Check valves for damage. Replace valve or valve seat accordingly.
• If two adjacent cylinders have respectively low compression pressure and their compression remains
low even after the addition of engine oil, cylinder head gasket is leaking. In such a case, replace cylinder
head gasket.
8.
After inspection is completed, install removed parts.
9.
Start engine, and make sure that engine runs smoothly.
10. Perform trouble diagnosis. If DTC appears, erase it. Refer to
AIR CLEANER AND AIR DUCT
EM-25
< ON-VEHICLE REPAIR >
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ON-VEHICLE REPAIR
AIR CLEANER AND AIR DUCT
Exploded View
INFOID:0000000005274269
Removal and Installation
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NOTE:
Add mating marks as necessary for easier installation.
REMOVAL
1.
Remove the breather hose from the air duct.
2.
Disconnect MAF sensor.
3.
Loosen the air duct clamps and remove the air duct.
4.
Remove the air duct and resonator assembly bolts and remove air duct and resonator assembly.
• Remove resonator in fender lifting left fender protector, as necessary.
5.
Remove air cleaner case.
6.
Remove MAF sensor, if necessary.
INSPECTION AFTER REMOVAL
Inspect air duct and air duct and resonator assembly for cracks or tears.
• Replace air duct and air duct and resonator assembly, if necessary.
INSTALLATION
Installation is in the reverse order of removal.
1.
Air cleaner case
2.
Air duct and resonator assembly
3.
Air duct
4.
Intake manifold
5.
Air cleaner filter
LBIA0441E
EM-26
< ON-VEHICLE REPAIR >
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AIR CLEANER AND AIR DUCT
• Align marks. Attach each joint. Tighten clamps firmly.
• Install air duct and resonator assembly to air cleaner case by aligning "LOCK-UNLOCK" upward.
INTAKE MANIFOLD
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INTAKE MANIFOLD
Exploded View
INFOID:0000000005274271
Removal and Installation
INFOID:0000000005274272
CAUTION:
Do not remove or disassemble parts unless instructed as shown.
REMOVAL
1.
Release fuel pressure. Refer to
.
2.
Disconnect battery negative terminal. Refer to
PG-84, "Removal and Installation"
3.
Partially drain engine coolant. Refer to
CO-12, "Changing Engine Coolant"
1.
Vacuum hose
2.
Vacuum hose adapter
3.
O–ring
4.
Vacuum hose
5.
EVAP canister purge volume control
solenoid valve
6.
Vacuum hose
7.
Service port
8.
Collar
9.
Grommet
10. Intake manifold support
11. Vacuum hose
12. Gasket
13. Intake manifold
14. Fuel tube protector
15. Air cleaner filter
16. Air cleaner case
17. PCV hose
18. Gasket
19. PCV hose
20. Water hose
21. Water hose
22. Air duct
23. Electric throttle control actuator
24. Mass air flow sensor
A.
To vacuum pipe (EVAP canister)
B.
To brake booster
C.
To PCV valve
D. To heater outlet
E.
To heater pipe
F.
To rocker cover
Engine front
WBIA0733E
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