Nissan Frontier D22. Instruction — 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
.
●
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
[KA24DE]
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
. 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
EBS00GSG
Removal
EBS00GSH
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
[KA24DE]
CYLINDER HEAD
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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.
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Before removing camshaft and idler sprockets, apply paint marks to them for re-timing.
1.
Remove upper timing chain and idler sprocket. Refer to
and
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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
EBS00GSI
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
EBS00GSJ
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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