Infiniti G37 Coupe. Manual - part 612

 

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Infiniti G37 Coupe. Manual - part 612

 

 

COMPRESSION PRESSURE

EM-23

< ON-VEHICLE MAINTENANCE >

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• If compression pressure is below the 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 checking, measure compression pressure again.

• If a cylinder has low compression pressure, pour a 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 gaskets are leaking. In such a case, replace cyl-
inder head gaskets.

9.

After inspection is completed, install removed parts.

10. Start the engine, and check that the engine runs smoothly.

11. Perform trouble diagnosis. If DTC appears, erase it. Refer to 

EC-132, "Description"

.

EM-24

< ON-VEHICLE REPAIR >

ENGINE COVER

ON-VEHICLE REPAIR

ENGINE COVER

Exploded View

INFOID:0000000001636248

Removal and Installation

INFOID:0000000001636249

REMOVAL

Remove engine cover with power tool.

CAUTION:

Never damage or scratch engine cover when installing or removing.

INSTALLATION

Installation is the reverse order of removal.

1

: Engine cover

JPBIA1049GB

DRIVE BELT AUTO TENSIONER AND IDLER PULLEY

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DRIVE BELT AUTO TENSIONER AND IDLER PULLEY

Exploded View

INFOID:0000000001547578

Removal and Installation

INFOID:0000000001547579

Removal

1.

Remove drive belt. Refer to 

EM-12, "Exploded View"

.

• Keep auto-tensioner pulley arm locked after drive belt is removed.

2.

Remove auto-tensioner and idler pulley. Refer to 

EM-12, "Exploded View"

.

• Keep auto-tensioner pulley arm locked to install or remove auto-tensioner.

Installation

Installation is the reverse order of removal.

CAUTION:

If there is damage greater than peeled paint, replace drive belt auto-tensioner.

1.

Front timing chain case

2.

Idler pulley

3.

Drive belt auto-tensioner

4.

Idler pulley

5.

Idler pulley

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPBIA1059GB

EM-26

< ON-VEHICLE REPAIR >

AIR CLEANER AND AIR DUCT

AIR CLEANER AND AIR DUCT

Exploded View

INFOID:0000000001547580

Removal and Installation

INFOID:0000000001547581

REMOVAL

1.

Disconnect mass air flow sensor harness connector.

2.

Disconnect PCV hose.

3.

Remove air cleaner case & mass air flow sensor assembly and air duct & air hose by disconnecting their
joints.
• Add marks as necessary for easier installation.

4.

Remove mass air flow sensor from air cleaner case, as necessary.

CAUTION:

Handle mass air flow sensor according to the following instructions.
• Never shock it.
• Never disassemble it.
• Never touch its sensor.

INSTALLATION

Note the following, and install in the reverse order of removal.

1.

Mass air flow sensor (RH)

2.

Air cleaner filter

3.

Holder

4.

Bracket

5.

Resonator (RH)

6.

Bracket

7.

Grommet

8.

Grommet

9.

Air cleaner case (RH)

10. Clamp

11.

Air duct (RH)

12. Clamp

13. PCV hose

14. Air duct (LH)

15. Mass air flow sensor (LH)

16. Air cleaner case (LH)

17. Bracket

18. Resonator (LH)

19. Bracket

20. Clamp

21. PCV hose

A.

To electric throttle control actuator

B.

To rocker cover (bank 2)

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPBIA1349GB

 

 

 

 

 

 

 

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