Infiniti G35 (V35) Sedan. Manual — part 628
CYLINDER HEAD
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< DISASSEMBLY AND ASSEMBLY >
C
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E
F
G
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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
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
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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
.
1.
Using a scraper, wipe off oil, scale, gasket, sealant and carbon deposits from surface of cylinder head.
CAUTION:
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B
: High strength locking sealant application area
Standard press-fit height:
: 37.7 - 38.7 mm (1.484 - 1.524 in)
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Limit [(C) - (B)]
: 0.18 mm (0.0071 in)
A
: Measuring point
e
: 48 mm (1.89 in)
d
: 11 mm (0.43 in)
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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
.
• 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
.
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
Valve Spring Squareness
Limit
: Refer to
.
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Standard
: Refer to
.
(Intake and exhaust)
Standard
: Refer to
.
(Intake and exhaust)
Valve guide clearance
: Refer to
.
Standard and limit (Intake and exhaust)
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A
: OK
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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
.
B
: Contact
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Standard (Intake and exhaust)
: Refer to
.
Free height
Installation height
Installation load
Height during valve open
Load with valve open
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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
—
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CYLINDER BLOCK
CYLINDER BLOCK
Exploded View
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Disassembly and Assembly
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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
B.
Chamfered
C.
Front mark
: Crankshaft side
JPBIA0101GB
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