Infiniti Q45. Manual — part 561

CAMSHAFT

EM-61

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8.

Remove adjusting shim using a small screwdriver and a mag-
netic hand.

9.

Determine replacement adjusting shim size following formula.

●

Using a micrometer determine thickness of removed shim
with measured at center.

●

Calculate thickness of new adjusting shim so valve clearance
comes within specified values.
R = Thickness of removed shim
N = Thickness of new shim
M = Measured valve clearance

Shims are available in 64 sizes from 2.32 mm (0.0913 in)
to 2.95 mm (0.1161 in) in steps of 0.01 mm (0.0004 in). Refer to

EM-112, "Available Shims"

.

●

Select new shim with thickness as close as possible to calcu-
lated value.

10. Install new shim using a suitable tool.

●

Install with the surface on which the thickness stamped
is facing down.

PBIC2359E

Intake

: N = R + [M

−

0.30 mm (0.0118 in)]

Exhaust

: N = R + [M

−

0.33 mm (0.0130 in)]

SEM145D

SEM873E

PBIC1568E

EM-62

CAMSHAFT

11. Place the camshaft pliers (SST) as mentioned in step 4.

12. Remove the lifter stopper (SST).

13. Remove the camshaft pliers (SST).

14. Manually turn crankshaft pulley a few turns.

15. Make sure that valve clearances for cold engine are within specifications by referring to the specified val-

ues. Refer to

EM-57, "INSPECTION"

.

16. Install all removed parts in the reverse order of removal. Refer to

EM-54, "INSTALLATION"

.

17. Warm up the engine, and check for unusual noise and vibration.

PBIC1569E

OIL SEAL

EM-63

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OIL SEAL

PFP:00100

Removal and Installation of Valve Oil Seal

NBS001OU

REMOVAL

1.

Remove camshaft relating to valve oil seal to be removed. Refer to

EM-50, "CAMSHAFT"

.

2.

Remove adjusting shims and valve lifters. Refer to

EM-50, "CAMSHAFT"

.

●

Correctly identify location where each part is installed. Keep parts in an organized way to avoid mixing
them up.

3.

Turn crankshaft until the cylinder requiring new oil seals is at TDC. This will prevent the valve from drop-
ping into cylinder.

4.

Remove valve collet.

●

Compress valve spring with the valve spring compressor,
attachment and adapter (SST). Remove valve collet with
magnetic hand.

CAUTION:

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

5.

Remove valve spring retainer and valve spring (with valve spring seat).

CAUTION:

Do not remove valve spring seat from valve spring.

6.

Remove valve oil seal using the valve oil seal puller (SST).

INSTALLATION

1.

Install valve oil seal.

●

Apply engine oil on new valve oil seal joint and seal lip.

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Install with the valve oil seal drift (SST) to match dimension in
figure.

2.

Install in the reverse order of removal.

PBIC2360E

PBIC0072E

PBIC0073E

EM-64

OIL SEAL

Removal and Installation of Front Oil Seal

NBS001OV

REMOVAL

1.

Remove the following:

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Engine undercover

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Drive belt; Refer to

EM-14, "DRIVE BELTS"

.

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Cooling fan assembly; Refer to

CO-18, "COOLING FAN"

.

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Rear plate cover; Refer to

EM-26, "OIL PAN AND OIL STRAINER"

.

2.

Remove crankshaft pulley as follows:

a.

Set the ring gear stopper (SST).

b.

Loosen crankshaft pulley bolt.

c.

Pull crankshaft pulley with both hands to remove it.

CAUTION:

●

Do not remove crankshaft pulley bolt. Keep loosened
crankshaft pulley bolt in place to protect removed crank-
shaft pulley from dropping.

●

Do not remove balance weight (inner hexagon bolt) at the
front of crankshaft pulley.

3.

Remove front oil seal using a suitable tool.

CAUTION:

Be careful not to damage front cover and oil pump drive
spacer.

INSTALLATION

1.

Install front oil seal onto front cover.

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Install new front oil seal in the direction shown in the figure.

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Apply engine oil on new front oil seal.

CAUTION:

Be careful not to scratch or make burrs on circumference
of oil seal.

PBIC1656E

SBIA0358E

SBIA0359E

SEM715A