Nissan Frontier D22. Manual - part 681

 

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Nissan Frontier D22. Manual - part 681

 

 

OIL SEAL

EM-31

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Install the new oil seal in the direction shown.

5.

Install rear oil seal retainer.

a.

Before installing rear oil seal retainer, remove all traces of liquid
gasket from mating surface using a scraper as shown. Also
remove all traces of the old liquid gasket from the mating sur-
face of the cylinder block.

b.

Apply a continuous bead of liquid gasket to mating surface of
rear oil seal retainer. Use Genuine Silicone RTV Sealant or
equivalent. Refer to 

GI-42, "RECOMMENDED CHEMICAL

PRODUCTS AND SEALANTS"

 .

Apply the liquid gasket around the inner side of the bolt holes.

SEM715A

Rear oil seal 
retainer bolts

: 6.4 - 7.5 N·m (0.65 - 0.76 kg-m, 
56 - 66 in-lb)

SEM896A

AEM404

EM-32

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CYLINDER HEAD

CYLINDER HEAD

PFP:11041

On-Vehicle Service

EBS00GSF

CHECKING COMPRESSION PRESSURE

1.

Warm up the engine.

2.

Turn the ignition switch OFF.

3.

Release the fuel pressure.
Refer to 

EC-46, "FUEL PRESSURE RELEASE"

 .

4.

Remove all of the spark plugs.

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

5.

Disconnect the camshaft position sensor harness connector at the distributor.

6.

Remove the fuel injector fuse No. 3  on FUSE BLOCK (J/B) behind the driver side instrument lower panel.

7.

Attach a compression tester to the No. 1 cylinder as shown.

8.

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

9.

Crank the engine and record the highest gauge indication.

10. Repeat the measurement on each cylinder.

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

11. If the compression in one or more cylinders is low:

a.

Pour a small amount of engine oil into the cylinders through the spark plug hole.

b.

Retest the compression.

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

If pressure stays low, a valve may be sticking or seating improperly. Inspect and repair valve and valve
seat. Refer to 

EM-40, "VALVE DIMENSIONS"

 , 

EM-39, "VALVE SEATS"

 . If valve or valve seat is dam-

aged excessively, replace it.

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

12. Reinstall the spark plugs, fuel injector fuse, fuel pump fuse, and reconnect camshaft position sensor har-

ness connector at the distributor.

13. Erase the DTC stored in the ECM.

Refer to 

EC-61, "HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION"

 .

CAUTION:

Always erase the DTC after checking compression.

SEM486D

Compression

: kPa (kg/cm

2

 , psi)/300 rpm

Standard

: 1,226 (12.5, 178)

Minimum

: 1,030 (10.5, 149)

Difference limit between cylinders

: 98 (1.0, 14)

CYLINDER HEAD

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Components

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Removal 

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CAUTION:

When installing camshafts, chain tensioners, oil seals, or other sliding parts, lubricate contacting
surfaces with new engine oil.

1.

Oil filler cap

2.

Rocker cover

3.

Camshaft bracket

4.

Intake camshaft

5.

Exhaust camshaft

6.

Adjusting shim

7.

Valve lifter

8.

Valve cotter

9.

Spring retainer

10. Valve spring

11. Spring seat

12. Valve oil seal

13. Intake valve

14. Exhaust valve

15. Cylinder head

16. Cylinder head bolt

17. Valve guide

18. Valve seat

19. Rocker cover gaskets

20. Cylinder head gasket

WBIA0233E

EM-34

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CYLINDER HEAD

Apply new engine oil to threads and seat surfaces when installing cylinder head, camshaft
sprocket, crankshaft pulley, and camshaft bracket.

Attach tags to valve lifters so as not to mix them up.

Before removing camshaft and idler sprockets, apply paint marks to them for re-timing.

1.

Remove upper timing chain and idler sprocket. Refer to 

EM-21, "UPPER TIMING CHAIN"

  and 

EM-21,

"IDLER SPROCKET"

 .

For re-timing during cylinder head removal and installation, apply paint marks to the camshaft sprock-
ets, upper timing chain, lower timing chain, and idler sprocket.

2.

Remove camshaft brackets and camshafts. Remove the bolts in
the reverse order as shown.

Mark the part with their original position and direction for cor-
rect placement for installation.

3.

Remove the cylinder head bolts in numerical order as shown.

Loosen the cylinder head bolts in two or three steps.

CAUTION:

Remove the bolts in the correct numerical order to avoid
warping or cracking the cylinder head.

4.

Remove the cylinder head and cylinder head gasket.

Disassembly

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1.

Remove the intake manifold and exhaust manifold. Refer to 

EM-13, "Removal and Installation"

 .

2.

Remove the valve components using Tool as shown.

3.

Remove the valve oil seals using a suitable tool.

Inspection

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CYLINDER HEAD DISTORTION

1.

Clean the sealing surface of the cylinder head.

AEM352

SEM274D

Valve spring compressor

: KV101092S0 (J26336-B)

SEM692D

 

 

 

 

 

 

 

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