2005 NISSAN NAVARA engine

CAMSHAFT
EM-65
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7. Apply liquid gasket to cylinder head rear cover as shown in the
figure.
Use Genuine Liquid Gasket or Equivalent.
8. Install cylinder head rear cover and tighten mounting bolts in
numerical order shown in the figure.
9. Before installing spill tube after installing secondary timing chain, check and adjust valve clearance. Refer
toEM-66, "
Valve Clearance".
10. Hereafter, install in the reverse order of removal.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The following are procedures for checking fluids leak, lubricates leak and exhaust gases leak.
lBefore starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer toMA-14, "
RECOMMENDED FLUIDS AND LUBRICANTS".
lUse procedure below to check for fuel leakage.
–Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel
leakage at connection points.
–Start engine. With engine speed increased, check again for fuel leakage at connection points.
lRun engine to check for unusual noise and vibration.
lWarm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant.
lBleed air from lines and hoses of applicable lines, such as in cooling system.
lAfter cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
*1: Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
*2: Check engine oil level 10 minutes after engine stopped.
PBIC3446E
M6´50 mm : Bolt No.1, 2
M6´20 mm : Bolt No.3, 4
M8´20 mm : Bolt No.5, 6
PBIC3445E
Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level (*2)
Other oils and fluid (*1) Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gases — Leakage —

EM-66
CAMSHAFT
Valve Clearance
EBS01E67
INSPECTION
lWhen the camshaft or parts in connection with valves are removed or replaced, and a malfunction has
occurred (poor starting, idling, or other malfunction) due to the misadjustment of the valve clearance,
inspect as follows.
lInspect and adjust when the engine is cool (at normal temperature).
lBe careful of the intake and exhaust valve arrangement. The
valve arrangement is different from that in a normal engine.
NOTE:
The camshafts have, alternately, either intake valve or exhaust
valve. (Refer to figure.)
1. Remove rocker cover. Refer toEM-56, "
ROCKER COVER".
2. Remove fuel injector. Refer toEM-44, "
INJECTION TUBE AND FUEL INJECTOR".
3. Set the No. 1 piston to TDC on its compression stroke.
lTurn crankshaft pulley clockwise so that the knock pin on
camshaft left side faces straight above. (No position indicator,
etc. is provided on the crankshaft pulley.)
4. Remove undercover, put an alignment mark with paint, etc. on
crankshaft pulley and on oil pump housing as an angle indicator.
5. While referring to the figure, measure the valve clearance
marked in the table below.
NOTE:
lThe injection order is 1-3-4-2.
SBIA0178E
PBIC2533E
1 : Crankshaft pulley
A : Alignment mark
: Vehicle front
PBIC3447E
Measuring pointNo. 1 No. 2 No. 3 No. 4
INT EXH INT EXH INT EXH INT EXH
When the No. 1
cylinder is in the
TDCXXX X
SBIA0180E

CAMSHAFT
EM-67
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lMeasure the valve clearance using the feeler gauge when
engine is cool (at normal temperature).
Valve clearance:
Unit: mm (in)
*: Reference data approximately 80°C(176°F)
6. Set the No. 4 cylinder at TDC by rotating the crankshaft clockwise once. (360 degrees)
7. While referring to the figure, measure the valve clearance
marked in the table below.
8. If the valve clearance is outside the specification, adjust as fol-
lows.
ADJUSTMENTS
lRemove adjusting shim for parts which are outside the specified valve clearance.
1. Extract engine oil on the upper side of the cylinder head (for the air blowing in step 6).
2. Rotate crankshaft to face the camshaft for adjusting shims that
are to be removed upward.
3. Grip camshaft with the camshaft pliers [SST], then using cam-
shaft as a support point, push adjusting shim downward to com-
press valve spring.
CAUTION:
Do not damage camshaft, cylinder head and the outer cir-
cumference of valve lifter.
SBIA0181E
Item Cold Hot* (Reference data)
Intake 0.24 - 0.32 (0.0094 - 0.0126) 0.274 - 0.386 (0.0108 - 0.0152)
Exhaust 0.26 - 0.34 (0.0102 - 0.0134) 0.308 - 0.432 (0.0121 - 0.0170)
Measuring pointNo. 1 No. 2 No. 3 No. 4
INT EXH INT EXH INT EXH INT EXH
When the No. 4
cylinder is in the
TDCXX XX
SBIA0182E
SBIA0183E
PBIC2321E

EM-68
CAMSHAFT
4. Withvalvespringinacompressedstate,removethecamshaft
pliers [SST] by securely setting the outer circumference of the
valve lifter with the end of the lifter stopper [SST].
lHold the lifter stopper by hand until the shim is removed.
CAUTION:
Do not retrieve the camshaft pliers forcefully, as cam-
shaft will be damaged.
5. Move the round hole of adjusting shim to the front with the very
thin screwdriver or like that.
lWhen adjusting shim on valve lifter will not rotate smoothly,
restart from step 3 to release the end of the lifter stopper
[SST] from touching adjusting shim.
6. Remove adjusting shim from valve lifter by blowing air through
the round hole of the adjusting shim with the air gun.
CAUTION:
To prevent any remaining engine oil from being blown
around, thoroughly wipe the area clean and wear protective
goggles.
7. Remove adjusting shim by using the magnet hand.
8. Measure the thickness of adjusting shim using the micrometer.
lMeasure near the center of the shim (the part that touches
camshaft).
9. Select the new adjusting shim from the following methods.
PBIC2322E
PBIC2323E
PBIC2324E
FEM032
Calculation method of the adjusting shim thickness:
R = Thickness of removed shim
N = Thickness of new shim
M = Measured valve clearance
Intake
N=R+[M-0.28mm(0.0010in)]
Exhaust
N=R+[M-0.30mm(0.0118in)]

CAMSHAFT
EM-69
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lNew adjusting shims have the thickness stamped on the rear
side.
lShims are available in 33 size from 2.10 mm (0.0827 in) to
2.74 mm (0.1079 in), in steps of 0.02 mm (0.0008 in). Refer to
EM-137, "
Available Shims".
10. Fit the selected adjusting shim to valve lifter.
CAUTION:
Place the stamped side of adjusting shim to valve lifter.
11. Compress valve spring using the camshaft pliers [SST: KV10115110] and remove the lifter stopper [SST].
12. Rotate crankshaft 2 to 3 turns by hand.
13. Confirm that the valve clearance is within the specification. Refer toEM-66, "
INSPECTION".
14. Install remaining parts in the reverse order of removal.
15. Warm up engine, and check for unusual noise and vibration.
JEM184G
PBIC2325E

EM-70
OIL SEAL
OIL SEAL
PFP:12279
Removal and Installation of Valve Oil SealEBS01EK7
REMOVAL
1. Turn crankshaft until the cylinder requiring new valve oil seals is at TDC. This will prevent valve from drop-
ping into cylinder.
2. Remove camshafts. Refer toEM-59, "
CAMSHAFT".
3. Remove adjusting shims and valve lifters. Refer toEM-59, "
CAMSHAFT".
lCheck the installation positions, and keep them to avoid being confused.
4. Rotate crankshaft, and set piston whose valve oil seal is to be removed to TDC. This will prevent valve
from dropping into cylinder.
5. Remove valve collet.
lCompress the valve spring with valve spring compressor,
attachment and adapter [SST]. Remove valve collet with a
magnet hand.
CAUTION:
When working, be careful not to damage valve lifter holes.
6. Remove valve spring retainer and valve spring.
7. Remove valve oil seal with the valve oil seal puller [SST].
INSTALLATION
1. Apply new engine oil to valve oil seal joint surface and seal lip.
2. Using the valve oil seal drift [SST], install valve oil seals referring
to the dimension shown in the figure.
3. Install in the reverse order of removal.
PBIC2388E
JEM153G
JEM165G

OIL SEAL
EM-71
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Removal and Installation of Front Oil SealEBS01EK8
REMOVAL
1. Remove the following parts.
lUndercover
lDrive belt; Refer toEM-12, "DRIVE BELTS".
lCrankshaft pulley; Refer toEM-79, "PRIMARY TIMING CHAIN".
2. Remove front oil seal with a suitable tool.
CAUTION:
Be careful not to damage oil pump housing and crankshaft.
INSTALLATION
1. Apply new engine oil to new front oil seal joint surface and seal lip.
2. Install front oil seal so that each seal lip is oriented as shown in
the figure.
lUsing the suitable drift [60 mm (2.36 in) dia.] (A), press fit the
oil seal (2) so that the dimension is as specified in the figure.
CAUTION:
Do not touch lips of oil seal. Make sure seal surfaces are
free of foreign materials.
3. Install in the reverse order of removal.
PBIC4050E
SEM715A
1 : Oil pump
PBIC4051E

EM-72
OIL SEAL
Removal and Installation of Rear Oil Seal
EBS01EK9
REMOVAL
1. Remove transmission and transfer assembly. Refer toMT-16, "TRANSMISSION ASSEMBLY"(M/T mod-
els) andAT- 2 4 7 , "
TRANSMISSION ASSEMBLY"(A/T models).
2. Remove flywheel (M/T models) or drive plate (A/T models). Refer toEM-110, "
CYLINDER BLOCK".
3. Remove rear oil seal with a suitable tool.
CAUTION:
Be careful not to damage crankshaft and cylinder block.
INSTALLATION
1. Apply new engine oil to new rear oil seal joint surface and seal lip.
2. Install rear oil seal so that each seal lip is oriented as shown in
the figure.
lPress in rear oil seal (2) to rear oil seal retainer (1) as shown
in the figure.
lUsing the drift [100 mm (3.94 in) dia.] (A), press fit so that the
dimension is as specified in the figure.
lAvoid inclined fitting. Force fit perpendicularly.
3. Install in the reverse order of removal after this step.
SEM715A
PBIC4052E