Infiniti G35 (V35) Sedan. Manual - part 628

 

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Infiniti G35 (V35) Sedan. Manual - part 628

 

 

CYLINDER HEAD

EM-111

< DISASSEMBLY AND ASSEMBLY >

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8.

Install valve collet.
• Compress valve spring with the valve spring compressor [SST:

KV10116200 (J26336-A)] (A), the attachment [SST:
KV10115900 (J26336-20)] (C) and the adapter [SST:
KV10116200 (

)] (B). Install valve collet with a magnet

hand.

CAUTION:

When working, take care not to damage valve lifter holes.

• Tap valve stem edge lightly with plastic hammer after installa-

tion to check its installed condition.

9.

Install valve lifter.
• Install it in the original position.

10. Install spark plug tube.

• Press-fit spark plug tube as follows:

a.

Remove old locking sealant adhering to cylinder head mounting hole.

b.

Apply sealant to area within approximately 12 mm (0.47 in) from edge of spark plug tube press-fit side.
Use Genuine High Strength Locking Sealant or equivalent. Refer to 

GI-15, "Recommended Chemi-

cal Products and Sealants"

.

c.

Using drift, press-fit spark plug tube so that its height (A) is as
specified in the figure.

CAUTION:

• When press-fitting, take care not to deform spark plug

tube.

• After press-fitting, wipe off liquid gasket protruding onto

cylinder-head upper face.

11. Install spark plug with spark plug wrench (commercial service tool).

Inspection

INFOID:0000000000956286

INSPECTION AFTER REMOVAL

Cylinder Head Bolts Outer Diameter

• Cylinder head bolts are tightened by plastic zone tightening

method. Whenever the size difference between (C) and (B)
exceeds the limit, replace them with new one. 

• If reduction of outer diameter appears in a position other than (B),

use it as (B) point.

Cylinder Head Distortion

NOTE:
When performing this inspection, cylinder block distortion should be also checking. Refer to 

EM-146,

"Cylinder Block"

.

1.

Using a scraper, wipe off oil, scale, gasket, sealant and carbon deposits from surface of cylinder head.

CAUTION:

JPBIA0180ZZ

B

: High strength locking sealant application area

Standard press-fit height:

: 37.7 - 38.7 mm (1.484 - 1.524 in)

JPBIA0181ZZ

Limit [(C) - (B)]

: 0.18 mm (0.0071 in)

A

: Measuring point

e

: 48 mm (1.89 in)

d

: 11 mm (0.43 in)

JPBIA0173ZZ

EM-112

< DISASSEMBLY AND ASSEMBLY >

CYLINDER HEAD

Do not allow gasket fragments to enter engine oil or engine coolant passages.

2.

At each of several locations on bottom surface of cylinder head,
measure the distortion in six directions (A- F).

• If it exceeds the limit, replace cylinder head.

INSPECTION AFTER DISASSEMBLY

Valve Dimensions

• Check the dimensions of each valve. For the dimensions, refer to 

EM-144, "Cylinder Head"

.

• If dimensions are out of the standard, replace valve and check valve seat contact. Refer to "VALVE SEAT

CONTACT".

Valve Guide Clearance

Valve Stem Diameter

• Measure the diameter of valve stem with micrometer (A).

Valve Guide Inner Diameter

• Measure the inner diameter of valve guide with bore gauge.

Valve Guide Clearance

• (Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter)

• If the calculated value exceeds the limit, replace valve and/or valve guide. When valve guide must be

replaced, refer to 

EM-103, "Exploded View"

.

Valve Seat Contact

• After confirming that the dimensions of valve guides and valves are

within the specifications, perform this procedure.

• Apply prussian blue (or white lead) onto contacting surface of valve

seat to check the condition of the valve contact on the surface.

• Check if the contact area band is continuous all around the circum-

ference.

• If not, grind to adjust valve fitting and check again. If the contacting

surface still has “NG” (B) conditions even after the re-check,
replace valve seat. Refer to 

EM-103, "Exploded View"

.

Valve Spring Squareness

Limit

: Refer to 

EM-144, "Cylinder Head"

.

JPBIA0176ZZ

Standard 

: Refer to 

EM-144, 

"Cylinder Head"

.

(Intake and exhaust)

Standard

: Refer to 

EM-144, 

"Cylinder Head"

.

(Intake and exhaust)

Valve guide clearance

: Refer to 

EM-144, "Cylinder Head"

.

Standard and limit (Intake and exhaust)

JPBIA0183ZZ

A

:  OK

JPBIA0187ZZ

CYLINDER HEAD

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• Set a try square (A) along the side of valve spring and rotate

spring. Measure the maximum clearance between the top of spring
and try square.

• If it exceeds the limit, replace valve spring.

Valve Spring Dimensions and Valve Spring Pressure Load

• Check the valve spring pressure at specified spring height.

• If the installation load or load with valve open is out of the stan-

dard, replace valve spring.

INSPECTION AFTER INSTALLATION

Inspection for Leaks

The following are procedures for checking fluids leak, lubricates leak and exhaust gases leak.

• Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required

quantity, fill to the specified level. Refer to 

GI-15, "Recommended Chemical Products and Sealants"

.

• Use procedure below to check for fuel leakage.
- Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leak-

age at connection points.

- 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 make sure there is no leakage of fuel, exhaust gases, or any oil/fluids includ-

ing 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.

Limit

: Refer to 

EM-144, "Cylinder Head"

.

B

:  Contact

JPBIA0189ZZ

Standard (Intake and exhaust)

: Refer to 

EM-144, 

"Cylinder Head"

.

Free height

Installation height

Installation load

Height during valve open

Load with valve open

SEM113

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

EM-114

< DISASSEMBLY AND ASSEMBLY >

CYLINDER BLOCK

CYLINDER BLOCK

Exploded View

INFOID:0000000000956287

Disassembly and Assembly

INFOID:0000000000956288

1.

Sub harness

2.

Knock sensor

3.

Crankshaft position sensor

4.

Cylinder block

5.

Cylinder block heater (for Canada)

6.

O-ring

7.

Thrust bearing

8.

Main bearing (upper)

9.

Crankshaft

10. Crankshaft key

11. Main bearing (lower)

12. O-ring

13. Lower cylinder block bolt

14. Baffle plate

15. Lower cylinder block

16. Pilot converter

17. Reinforcement plate (A/T models)

18. Drive plate (A/T models)

19. Rear oil seal

20. Fly wheel (M/T models)

21. Oil jet

22. Top ring

23. Second ring

24. Oil ring

25. Piston

26. Piston pin

27. Snap ring

28. Connecting rod

29. Connecting rod bearing

30. Connecting rod bearing cap

31. Connecting rod bolt

A.

Refer to 

EM-114

B.

Chamfered

C.

Front mark

: Crankshaft side

JPBIA0101GB

 

 

 

 

 

 

 

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