Infiniti Q45. Manual - part 562

 

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Infiniti Q45. Manual - part 562

 

 

OIL SEAL

EM-65

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Using the front oil seal drift (commercial service tool) or drift
with 54 mm (2.13 in) diameter, force fit the seal until it levels
with the front end surface of front cover.

CAUTION:

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

Press fit straight and avoid causing burrs or tilting oil
seal.

2.

Install in the reverse order of removal.

SBIA0359E

EM-66

OIL SEAL

Removal and Installation of Rear Oil Seal

NBS001OW

REMOVAL

1.

Remove transmission assembly. Refer to 

AT-249, "TRANSMISSION ASSEMBLY"

 .

a.

Remove drive plate. Refer to 

EM-83, "Disassembly and Assembly"

 .

b.

Remove engine rear plate. Refer to 

EM-83, "Disassembly and Assembly"

 .

2.

Remove rear oil seal using a suitable tool.

CAUTION:

Be careful not to damage crankshaft and oil seal retainer
surface.

INSTALLATION

1.

Install rear oil seal using the rear oil seat drift (commercial service tool).

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

Apply engine oil on new rear oil seal.

CAUTION:

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

Tap until flattened with front edge of oil seal retainer. Do not
damage or scratch outer circumference of oil seal.

CAUTION:

Be careful not to damage crankshaft and rear oil seal
retainer.

Press fit straight and avoid causing burrs or tilting oil
seal.

2.

Install in the reverse order of removal.

PBIC2866E

SEM715A

PBIC2866E

CYLINDER HEAD

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CYLINDER HEAD

PFP:11041

On-Vehicle Service

NBS001OX

CHECKING COMPRESSION PRESSURE

1.

Warm up engine thoroughly. Then, stop it.

2.

Remove engine cover (with power tool), air cleaner cover and battery cover. Refer to 

EM-13, "Removal

and Installation"

 .

3.

Release fuel pressure as follows:

a.

Remove fuel pump fuse, and start engine. Refer to 

EC-80, "FUEL PRESSURE RELEASE"

  for fuel pump

fuse location.

b.

After engine stalls, crank it two or three times to release all fuel pressure.

Let fuel pump fuse removed until the end of step 7.

4.

Remove ignition coil and spark plug from each cylinder. Refer to 

EM-29, "Removal and Installation"

  and

EM-30, "Removal and Installation"

 .

5.

Connect engine tachometer (not required in use of CONSULT-II).

6.

Install the compression gauge with adapter (SST) onto spark
plug hole.

Use the compression gauge adapter (SST) which is required
on No. 7 and No. 8 cylinders.

Use the compression gauge adapter (if no SST is used)
whose picking up end inserted to spark plug hole is smaller
than 20 mm (0.79 in) in diameter. Otherwise, it may be caught
by cylinder head during removal.

7.

With accelerator pedal fully depressed, turn ignition switch to “START” for cranking. When the gauge
pointer stabilizes, read the compression pressure and engine rpm. Perform these steps to check each cyl-
inder.

Compression pressure

Unit: kPa (kg/cm

2

 , psi) /rpm

CAUTION:

Always use a fully charged battery to obtain specified engine speed.

If the engine speed is out of specified range, check battery liquid for proper gravity. Check engine
speed again with normal battery gravity. 

If compression pressure is below minimum value, check valve clearances and parts associated with
combustion chamber (Valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure compression pressure again.

If some cylinders have low compression pressure, pour small amount of engine oil into the spark plug
hole of cylinder to re-check it for compression.

PBIC1554E

SBIA0533E

Standard

Minimum

Deference limit      between cylinders

1,320 (13.5, 191) / 300

1,130 (11.5, 164) / 300

98 (1.0, 14) / 300

EM-68

CYLINDER HEAD

If the added engine oil improves the compression, the piston rings may be worn out or damaged. Check
piston rings and replace if necessary.

If the compression pressure remains at low level despite the addition of engine oil, valves may be mal-
functioning. Check valves for damage. Replace valve or valve seat accordingly.

If two adjacent cylinders have respectively low compression pressure and their compression remains
low even after the addition of engine oil, cylinder head gaskets are leaking. In such a case, replace cyl-
inder head gaskets.

8.

Install removed parts in the reverse order of removal.

9.

Start engine, and confirm that engine runs smoothly.

10. Perform trouble diagnosis. If DTC appears, erase it. Refer to 

EC-82, "TROUBLE DIAGNOSIS"

 .

Removal and Installation

NBS001OY

REMOVAL

1.

Remove engine assembly from vehicle. Refer to 

EM-79, "Removal and Installation"

 .

2.

Remove the following components and related parts:

Auto tensioner of drive belts and idler pulley. Refer to 

EM-15, "Drive Belt Auto Tensioner and Idler Pul-

ley"

 .

Thermostat housing and radiator hose. Refer to 

CO-22, "Removal and Installation"

 .

Oil pan and oil strainer. Refer to 

EM-26, "Removal and Installation"

 . 

Intake manifold (upper and lower). Refer to 

EM-19, "Removal and Installation"

 . 

Fuel tube (right and left), fuel damper and fuel hose assembly and fuel injector. Refer to 

EM-32,

"Removal and Installation"

 . 

Ignition coil. Refer to 

EM-29, "Removal and Installation"

 .

Rocker cover. Refer to 

EM-37, "Removal and Installation"

 .

Exhaust manifold and three way catalyst. Refer to 

EM-23, "EXHAUST MANIFOLD AND THREE WAY

CATALYST"

 .

3.

Remove camshaft sprockets and camshafts. Refer to 

EM-50, "Removal and Installation"

 .

1.

Engine coolant temperature sensor

2.

Washer

3.

Cylinder head gasket (left bank)

4.

Harness bracket

5.

Cylinder head (right bank)

6.

Cylinder head bolt

7.

Cylinder head gasket (right bank)

8.

Cylinder head bolt

9.

Cylinder head (left bank)

PBIC2407E

 

 

 

 

 

 

 

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