Infiniti FX35, FX50 (S51). Manual - part 954

EM-116

< UNIT DISASSEMBLY AND ASSEMBLY >

[VQ35HR]

CYLINDER HEAD

- Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
• Warm up engine thoroughly to check there is no leakage of fuel, exhaust gases, or any oil/fluids including

engine oil and engine coolant.

• Bleed air from lines and hoses of applicable lines, such as in cooling system.
• After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the

specified level, if necessary.

Summary of the inspection items:

*: Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.

Items

Before starting engine

Engine running

After engine stopped

Engine coolant

Level

Leakage

Level

Engine oil

Level

Leakage

Level

Other oils and fluid*

Level

Leakage

Level

Fuel

Leakage

Leakage

Leakage

Exhaust gases

—

Leakage

—

CYLINDER BLOCK

EM-117

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CYLINDER BLOCK

Exploded View

INFOID:0000000005245176

1.

Sub harness

2.

Knock sensor

3.

Crankshaft position sensor

4.

Cylinder block heater (for Canada)

5.

Cylinder block 

6.

Thrust bearing

7.

Main bearing (upper)

8.

Crankshaft

9.

Crankshaft key

10. Main bearing (lower)

11. O-ring

12. Lower cylinder block bolt

13. Baffle plate

14. Lower cylinder block

15. Pilot converter

16. Reinforcement plate

17. Drive plate

18. Rear oil seal

19. Oil jet

20. Top ring

21. Second ring

22. Oil ring

23. Piston

24. Piston pin

25. Snap ring

26. Connecting rod

27. Connecting rod bearing

28. Connecting rod bearing cap

29. Connecting rod bolt

A.

Refer to 

EM-118

B.

Chamfered

C.

Front mark

JPBIA1827GB

EM-118

< UNIT DISASSEMBLY AND ASSEMBLY >

[VQ35HR]

CYLINDER BLOCK

Disassembly and Assembly

INFOID:0000000005245177

DISASSEMBLY

1.

Remove the following parts:
• Oil pans (lower and upper): Refer to 

EM-100, "2WD : Exploded View"

 (2WD models) or 

EM-103, "AWD

: Exploded View"

 (AWD models).

• Front and rear timing chain case: Refer to 

EM-53, "Exploded View"

 and 

EM-95, "Exploded View"

.

• Cylinder head: Refer to 

EM-107, "Exploded View"

.

2.

Remove knock sensor.

CAUTION:

Carefully handle sensor avoiding shocks.

3.

Remove baffle plate from lower cylinder block.

4.

Remove piston and connecting rod assembly with the following procedure:
• Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer to

EM-147, "Cylinder Block"

.

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.

Remove connecting rod bearing cap.

c.

Using a hammer handle or similar tool, push piston and connect-
ing 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 

EM-147, "Cylinder Block"

.

• Use a piston ring expander (commercial service tool) (A).

CAUTION:

• When removing piston rings, be careful not to damage

piston.

• Be careful not to damage piston rings by expanding them

excessively.

7.

Remove piston from connecting rod as per the following: 

: Crankshaft side

Refer to 

GI-4, "Components"

 for symbols in the figure.

PBIC2940E

JPBIA0194ZZ

CYLINDER BLOCK

EM-119

< UNIT DISASSEMBLY AND ASSEMBLY >

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a.

Using a snap ring pliers (A), remove snap rings.

b.

Heat piston to 60 to 70

°

C (140 to 158

°

F) with an industrial use

drier (A) or an equivalent.

c.

Push out piston pin with stick of outer diameter approximately 20
mm (0.79 in).

8.

Remove lower cylinder block bolts.
• Before loosening lower cylinder block bolts, measure the crankshaft end play. Refer to 

EM-147,

"Cylinder Block"

.

• Loosen lower cylinder block bolts in the reverse order shown

in the figure in several different steps.

9.

Remove lower cylinder block as per the following:

JPBIA0195ZZ

JPBIA0196ZZ

PBIC0262E

: Engine front

JPBIA0197ZZ