Infiniti G37 Coupe. Manual — part 618
IGNITION COIL, SPARK PLUG AND ROCKER COVER
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4.
Tighten bolts in two steps separately in numerical order as
shown in the figure.
5.
Install in the reverse order of removal after this step.
A
: Bank 1
B
: Bank 2
: Engine front
1st step: 2.0 N·m (0.2 kg-m, 18 in-lb)
2nd step: 8.3 N·m (0.85 kg-m, 73 in-lb)
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TIMING CHAIN
TIMING CHAIN
Exploded View
INFOID:0000000001547600
1.
Timing chain (secondary)
2.
Camshaft sprocket (EXH)
3.
O-ring
4.
Timing chain (secondary)
5.
Camshaft sprocket (EXH)
6.
Internal chain guide
7.
Timing chain (primary)
8.
Camshaft sprocket (INT)
9.
Timing chain tensioner (primary)
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TIMING CHAIN
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Removal and Installation
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REMOVAL
1.
Release the fuel pressure. Refer to
.
2.
Disconnect the battery cable from the negative terminal.
3.
Remove engine cover with power tool. Refer to
.
4.
Remove radiator reservoir tank. Refer to
5.
Remove air duct and air cleaner case assembly (RH and LH). Refer to
6.
Remove engine undercover with power tool.
7.
Drain engine coolant from radiator. Refer to
.
CAUTION:
• Perform this step when the engine is cold.
• Never spill engine coolant on drive belt.
8.
Remove radiator hose (upper and lower). Refer to
.
9.
Drain engine oil. Refer to
.
CAUTION:
Perform this step when the engine is cold.
10. Remove radiator cooling fan assembly. Refer to
.
11. Remove drive belt. Refer to
EM-12, "Removal and Installation"
.
12. Separate engine harnesses by removing their brackets from front timing chain case.
13. Remove oil cooler tube. Refer to
14. Remove intake manifold collector. Refer to
15. Remove fuel sub tube mounting bolt. Refer to
16. Remove oil level gauge and oil level gauge guide.
17. Remove A/C compressor from bracket with piping connected, and temporarily secure it aside. Refer to
18. Remove power steering oil pump from bracket with piping connected, and temporarily secure it aside.
ST-34, "EXCEPT FOR SPORT MODELS : Exploded View"
.
19. Remove power steering oil pump bracket.
20. Remove idler pulley, drive belt auto-tensioner and bracket. Refer to
21. Remove alternator and alternator bracket. Refer to
.
22. Remove water pipe. Refer to
10.
Slack guide
11. Crankshaft sprocket
12.
Camshaft sprocket (INT)
13.
Tension guide
14.
Intake valve timing control cover
gasket (bank 1)
15.
Seal ring
16.
Intake valve timing control cover
(bank 1)
17. O-ring
18.
Camshaft position sensor (PHASE)
(bank 1)
19.
Oil level gauge
20. Oil level gauge guide
21.
O-ring
22.
Intake valve timing control solenoid
valve (bank 2)
23.
Intake valve timing control cover
(bank 2)
24.
Camshaft position sensor (PHASE)
(bank 2)
25.
Intake valve timing control cover
gasket (bank 2)
26. Front oil seal
27.
Crankshaft pulley
28.
Crankshaft pulley bolt
29.
Intake valve timing control solenoid
valve (bank 1)
30.
Power steering oil pump bracket
31.
Idler pulley bracket
32. Alternator bracket
33.
Water outlet (front)
34.
Front timing chain case
35. Rear timing chain case
36.
O-ring
37.
O-ring
38. O-ring
A.
Refer to
B.
C.
Oil filter
for symbol marks in the figure.
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TIMING CHAIN
23. Remove camshaft position sensor (PHASE).
CAUTION:
• Handle carefully to avoid dropping and shocks.
• Never disassemble.
• Never allow metal powder to adhere to magnetic part at
sensor tip.
• Never place sensors in a location where they are exposed
to magnetism.
24. Remove intake valve timing control covers and gasket as follows:
a.
Disconnect intake valve timing control solenoid valve harness connector.
b.
Loosen mounting bolts in reverse order as shown in the figure.
CAUTION:
Shaft is internally jointed with camshaft sprocket (INT) cen-
ter hole. When removing, keep it horizontal until it is com-
pletely disconnected.
c.
Shaft is engaged with camshaft sprocket (INT) center hole on inside. Pull straight out so that it does not tilt
until the joint is disengaged.
25. Remove intake valve timing control solenoid valve, if necessary.
CAUTION:
Intake valve timing control solenoid valve is nonreusable. Never remove it unless required.
26. Remove rocker covers (bank 1 and bank 2). Refer to
27. Obtain No.1 cylinder at TDC of its compression stroke as follows:
a.
Rotate crankshaft pulley clockwise to align timing mark (grooved
line without color) with timing indicator.
b.
Check that exhaust cam noses on No.1 cylinder (engine front
side of bank 1) is located as shown in the figure.
• If not, turn crankshaft one revolution (360 degrees) and align
as shown in the figure.
28. Remove crankshaft pulley as follows:
A
: Keep free from magnetic materials
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: Bank 1
B
: Bank 2
C
: Dowel pin hole
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: Timing mark (grooved line without color)
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: Camshaft (EXH) (bank 1)
: Engine front
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