Nissan Frontier D22. Manual - part 698

OIL SEAL

EM-99

[VG33E and VG33ER]

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OIL SEAL

PFP:00100

Replacement

EBS00GTJ

VALVE OIL SEAL

1.

Remove the rocker cover.

2.

Remove the rocker shaft assembly and valve lifters with the valve lifter guide.

3.

Remove the valve spring using Tool as shown.

●

The piston concerned should be set at TDC to prevent the
valve from falling into the cylinder bore.

4.

Remove the valve oil seals.

●

When removing the intake side valve oil seal, use Tool or a
suitable tool.

●

When removing the exhaust side valve oil seal, pull it out with
a suitable tool.

5.

Apply new engine oil to the new valve oil seal and install it to
specification as shown.

●

When installing intake side valve oil seal, use Tool as shown.

●

When installing exhaust side valve oil seal, set it by hand.

CAMSHAFT OIL SEAL

1.

Remove the timing belt. Refer to 

EM-91, "Removal"

 .

2.

Remove the camshaft sprocket. Refer to 

EM-104, "Components"

 .

3.

Remove the camshaft. Refer to 

EM-108, "Disassembly"

 .

4.

Remove the camshaft oil seal.

SEM257A

SEM285A

WBIA0189E

EM-100

[VG33E and VG33ER]

OIL SEAL

CAUTION:

Be careful not to scratch camshaft.

5.

Apply new engine oil to the new camshaft oil seal.

6.

Position the oil seal in the specified direction as shown.

7.

Install the oil seal using Tool as shown.

8.

Install the remaining components in the reverse order of removal.

FRONT OIL SEAL

1.

Remove the timing belt and crankshaft sprocket. Refer to 

EM-91, "Removal"

 .

2.

Remove the oil pump assembly. Refer to 

LU-16, "Removal and Installation"

 .

3.

Remove the front oil seal from the oil pump body.

4.

Apply new engine oil to the new oil seal.

5.

Position the oil seal with the correct orientation as shown.

SEM715A

SEM284A

SEM241E

SEM715A

OIL SEAL

EM-101

[VG33E and VG33ER]

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6.

Install the new oil seal using a suitable tool as shown.

7.

Install the remaining components in the reverse order of removal

REAR OIL SEAL

1.

Remove the flywheel or drive plate. Refer to 

CL-12, "Components"

 .

2.

Remove the rear oil seal retainer.

3.

Remove the rear oil seal from the retainer.

CAUTION:

Be careful not to scratch the rear oil seal retainer.

4.

Apply new engine oil to the new oil seal.

5.

Position the new oil seal as shown.

6.

Install the new oil seal using a suitable tool.

7.

Install the rear oil seal retainer with a new gasket on the cylinder block.

CAUTION:

Always use a new oil seal retainer gasket.

8.

Install the remaining components in the reverse order of removal.

SEM241E

SEM715A

SEM242E

EM-102

[VG33E and VG33ER]

CYLINDER HEAD

CYLINDER HEAD

PFP:11041

Measurement of Compression

EBS00GTK

1.

Warm up the engine.

2.

Turn the ignition switch OFF.

3.

Release the fuel pressure. Refer to 

EC-46, "FUEL PRESSURE RELEASE"

  (VG33E), 

EC-46, "FUEL

PRESSURE RELEASE"

  (VG33ER).

4.

Remove all of the spark plugs.

●

Clean the area around the spark plug with compressed air before removing the spark plugs.

5.

Disconnect the camshaft position sensor harness connector at the distributor.

6.

Remove the fuel injector fuse 3  on FUSE BLOCK (J/B) behind the instrument panel lower panel. Refer to

PG-63, "FUSE BLOCK — JUNCTION BOX (J/B)"

 .

7.

Attach the compression tester to the spark plug hole for the No.
1 cylinder.

8.

Depress the accelerator pedal fully to keep the throttle valve wide open.

9.

Crank the engine and record the highest compression tester gauge reading.

10. Repeat the measurement on each cylinder.

NOTE:
Always use a fully-charged battery to obtain the specified engine speed.

11. If the cylinder compression in one or more cylinders is low, pour a small amount of engine oil into the cyl-

inders through the spark plug holes and retest the compression.

●

If adding oil improves the cylinder compression, the piston rings may be worn or damaged. If so,
replace the piston rings after checking the piston.

●

If the pressure stays low, a valve may be sticking or seating improperly. Inspect and repair the valve
and valve seat. If the valve or valve seat is damaged, replace them as necessary. Refer to 

EM-110,

"Inspection"

 .

●

If the compression in any two adjacent cylinders is low and if adding oil does not improve the compres-
sion, there is possible leakage past the head gasket. If so, replace the cylinder head gasket.

SEM814C

SEM387C

Compression

: kPa (kg/cm

2

 , psi)/300 rpm

Standard

: 1,196 (12.2, 173)

Minimum

: 883 (9.0, 128)

Difference limit between cylinders

: 98 (1.0, 14)