Infiniti QX56 (Z62). Manual — part 666
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ENGINE STAND SETTING
7.
Drain engine coolant by removing water drain plug (3) from both
sides of the cylinder block as shown in the figure.
1
: Washer
2
: Plug (engine coolant)
4
: Plug (engine oil)
5
: Washer
: Engine front
for symbol marks in the figure.
Water drain plug torque
: 19.6 N·m (2.0 kg/m, 14 ft-lb)
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ENGINE UNIT
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ENGINE UNIT
Disassembly
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1.
Remove intake manifold. Refer to
2.
Remove exhaust manifold. Refer to
.
3.
Remove oil pan (lower). Refer to
4.
Remove ignition coil and spark plug. Refer to
.
5.
Remove rocker cover. Refer to
6.
Remove timing chain. Refer to
.
7.
Remove exhaust camshaft and VVEL ladder assembly. Refer to
8.
Remove cylinder head. Refer to
Assembly
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Assemble in the reverse order of disassembly.
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CYLINDER BLOCK
CYLINDER BLOCK
Exploded View
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1.
Knock sensor
2.
Cylinder block
3.
Side bolt
4.
Thrust bearing
5.
Main bearing (upper)
6.
Crankshaft key
7.
Crankshaft
8.
Main bearing (lower)
9.
Main bearing cap
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CYLINDER BLOCK
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Disassembly and Assembly
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DISASSEMBLY
1.
Remove the following parts:
• Oil pans (lower and upper): Refer to
and
• Front cover and timing chain: Refer to
.
.
2.
Remove knock sensor.
CAUTION:
Carefully handle knock sensor avoiding shocks.
3.
Remove oil filter (for VVEL ladder assembly) from cylinder block, if necessary. Refer to
.
4.
Remove piston and connecting rod assembly as per the following:
• Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer to
CAUTION:
Be careful not to drop connecting rod bearing, and to scratch the surface.
a.
Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
b.
Loosen mounting bolts, and remove connecting rod bearing cap.
c.
Using a hammer handle (A) or similar tool, push piston and con-
necting rod assembly out to the cylinder head side.
CAUTION:
Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interference of the connecting rod big
end.
5.
Remove connecting rod bearings from connecting rod and connecting rod bearing cap.
CAUTION:
• Be careful not to drop connecting rod bearing, and to scratch the surface.
• Identify installation positions, and store them without mixing them up.
6.
Remove piston rings from piston.
• Before removing piston rings, check the piston ring side clearance. Refer to
.
10. Main bearing cap sub bolt
11. Main bearing cap bolt
12. Connecting rod cap bolt
13. Connecting rod cap
14. Connecting rod bearing
15. Connecting rod
16. Snap ring
17. Piston pin
18. Piston
19. Oil ring
20. Second ring
21. Top ring
22. Pilot converter
23. Drive plate
24. Reinforcement plate
25. Rear oil seal
26. Rear oil seal retainer
27. O-ring
28. Crankshaft position sensor (POS)
29. Cylinder block heater (for Canada)
A.
Comply with the assembly procedure
when tightening. Refer to
.
B.
Chamfered
C.
Installed on transmission
: Crankshaft side
Refer to
for symbol marks in the figure.
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