Infiniti G37 Coupe. Manual — part 622
TIMING CHAIN
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Timing Chain
Check for cracks and any excessive wear at link plates and roller
links of timing chain. Replace timing chain as necessary.
INSPECTION AFTER INSTALLATION
Inspection for Leakage
The following are procedures for checking fluid leakage, lubricant leakage.
• Before starting engine, check oil/fluid levels including engine coolant and engine oil. If any are less than the
required quantity, fill them to the specified level. Refer to
MA-10, "Fluids and Lubricants"
.
• Follow the procedure below to check for fuel leakage.
- Turn ignition switch to the “ON” position (with engine stopped). With fuel pressure applied to fuel piping,
check for fuel leakage 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.
NOTE:
If hydraulic pressure inside chain tensioner drops after removal/installation, slack in guide may generate a
pounding noise during and just after the engine start. However, this does not indicate a malfunction. The
noise will stop after hydraulic pressure rises.
• Warm up engine thoroughly to check that there is no leakage of fuel, 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 them to
the specified level, if necessary.
Summary of the inspection items:
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
A
: Crack
B
: Wear
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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 fluids*
Level
Leakage
Level
Fuel
Leakage
Leakage
Leakage
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OIL SEAL
OIL SEAL
VALVE OIL SEAL (EXH)
VALVE OIL SEAL (EXH) : Removal and Installation
INFOID:0000000001547606
REMOVAL
NOTE:
Since the valve oil seal (INT) cannot be replaced by the piece, VVEL ladder assembly & cylinder head assem-
bly replacement is required.
1.
Remove camshaft (EXH) and VVEL ladder assembly. Refer to
2.
Remove valve lifter (EXH). Refer to
3.
Turn crankshaft until the cylinder requiring new oil seal (EXH) is at TDC. This prevents valve from drop-
ping into cylinder.
4.
Remove valve collet (EXH).
• Compress valve spring (EXH) with the valve spring compres-
sor [SST: KV10116200 (J26336-A)] (A), the attachment [SST:
KV10115900 (J26336-20)] (C), and the adapter [SST:
KV10109220 (
—
)] (B). Remove valve collet (EXH) with a
magnet hand.
CAUTION:
When working, be careful not to damage valve lifter holes.
5.
Remove valve spring retainer (EXH) and valve spring (EXH).
6.
Remove valve oil seal (EXH) using the valve oil seal puller [SST:
KV10107902 (J38959)] (A).
INSTALLATION
1.
Apply new engine oil on new valve oil seal (EXH) joint and seal lip.
2.
Using the valve oil seal drift [SST: KV10115600 (J38958)] (A),
press fit valve seal (EXH) to height (b) shown in figure.
NOTE:
Dimension: Height measured before valve spring seat (EXH)
installation
3.
Install in the reverse order of removal after this step.
FRONT OIL SEAL
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Height (b)
: 14.3 - 14.9 mm (0.563 - 0.587 in)
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OIL SEAL
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FRONT OIL SEAL : Removal and Installation
INFOID:0000000001547607
REMOVAL
1.
Remove the following parts:
• Engine undercover with power tool.
• Drive belts: Refer to
.
• Crankshaft pulley: Refer to
.
2.
Remove front oil seal using a suitable tool.
CAUTION:
Be careful not to damage front timing chain case and crank-
shaft.
INSTALLATION
1.
Apply new engine oil to both oil seal lip and dust seal lip of new front oil seal.
2.
Install front oil seal.
• Install front oil seal so that each seal lip is oriented as shown in
the figure.
• Using a suitable drift, press-fit until the height of front oil seal is
level with the mounting surface.
- Suitable drift: outer diameter 60 mm (2.36 in), inner diameter
50 mm (1.97 in).
• Check that the garter spring is in position and seal lips are not
inverted.
CAUTION:
• Be careful not to damage front timing chain case and
crankshaft.
• Press-fit straight and avoid causing burrs or tilting oil
seal.
3.
Install in the reverse order of removal after this step.
REAR OIL SEAL
REAR OIL SEAL : Removal and Installation
INFOID:0000000001547608
REMOVAL
1.
Remove transmission assembly. Refer to
(A/T models).
2.
Remove drive plate (A/T models) or fly wheel (M/T models). Refer to
.
3.
Remove rear oil seal with a suitable tool.
CAUTION:
PBIC2931E
A
: Oil seal lip
B
: Dust seal lip
: Engine inside
: Engine outside
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PBIC2931E
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OIL SEAL
Be careful not to damage crankshaft and cylinder block.
INSTALLATION
1.
Install rear oil seal.
• Install rear oil seal so that each seal lip is oriented as shown in
the figure.
• Press in rear oil seal (1) to the position as shown in the figure.
• Using a suitable drift (A), press-fit until the height of rear oil seal is
level with the mounting surface.
- Suitable drift: outer diameter 100 mm (3.94 in), inner diameter 85
mm (3.35 in).
CAUTION:
• Be careful not to damage crankshaft and cylinder block.
• Press-fit straight and avoid causing burrs or tilting oil seal.
2.
Install in the reverse order of removal after this step.
PBIC2932E
A
: Oil seal lip
B
: Dust seal lip
: Engine inside
: Engine outside
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B
: Cylinder block rear end face
a
: 0 - 0.5 mm (0 - 0.020 in)
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