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ComponentsEBS01EKD
Disassembly and AssemblyEBS01E6C
DISASSEMBLY
1. Remove adjusting shims and valve lifters.
lCheck the installation positions, and keep them to avoid being confused.
2. Remove valve collet.
lUsing the valve spring compressor [SST], compress valve
spring. Using magnet hand, remove valve collets.
3. Remove valve spring retainers and valve springs.
4. Remove valves as pressing valve stems toward combustion chamber.
lBefore removing valve, check the valve guide clearance. Refer toEM-101, "Valve Guide Clearance".
1. Adjusting shim 2. Valve lifter 3. Valve collet
4. Valve spring retainer 5. Valve spring 6. Valve oil seal
7. Valve spring seat 8. Valve guide 9. Cylinder head
10. Valve seat 11. Valve (Exhaust) 12. Valve (Intake)
PBIC2328E
PBIC2388E
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CYLINDER HEAD
NOTE:
Refer to the figure for intake and exhaust valve positions.
Intake and exhaust valve driving cams are provided alter-
nately for each camshaft.
5. Remove valve oil seals using the valve oil seal puller [SST].
6. Remove valve spring seats.
7. Before removing valve seats, perform valve seat contact check.
Refer toEM-103, "
Va l v e S e a t C o n t a c t".
8. Before removing valve guides, perform valve guide clearance
check. Refer toEM-101, "
Valve Guide Clearance".
ASSEMBLY
1. Install valve guides. Refer toEM-102, "Valve Guide Replacement".
2. Install valve seats. Refer toEM-103, "
Valve Seat Replacement".
3. Using the valve oil seal drift [SST], install valve oil seals referring
to the dimension shown in the figure.
4. Install valve spring seats.
5. Install valves.
lInstall the valves with bigger outer diameter to intake valve
side.
lNote that valve layout here is different from that of conven-
tional engine.
6. Install valve spring.
7. Install valve spring retainers.
SBIA0196E
JEM153G
JEM165G
SBIA0196E
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![NISSAN NAVARA 2005 Repair Workshop Manual CYLINDER HEAD
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8. Using the valve spring compressor [SST], compress valve
springs.
Then install valve collets using magnet hand.
lAfter installing valve collets, tap th NISSAN NAVARA 2005 Repair Workshop Manual CYLINDER HEAD
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8. Using the valve spring compressor [SST], compress valve
springs.
Then install valve collets using magnet hand.
lAfter installing valve collets, tap th](/manual-img/5/57362/w960_57362-1482.png)
CYLINDER HEAD
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8. Using the valve spring compressor [SST], compress valve
springs.
Then install valve collets using magnet hand.
lAfter installing valve collets, tap the stem end using the plastic
hammer, and check the installation status.
9. Install valve lifters and adjusting shims to the same positions as before.
INSPECTION AFTER DISASSEMBLY
Valve Dimension
lCheck dimensions of each valve. For dimensions, refer toEM-
136, "Valve Dimensions".
lIf dimensions are out of the standard, replace valve.
Valve Guide Clearance
Valve Stem Diameter
lMeasure diameter of valve stem with micrometer.
Valve Guide Inner Diameter
lMeasure inner diameter of valve guide with inside micrometer.
Valve Guide Clearance
l(Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter).
PBIC2388E
SEM188A
Standard
Intake : 5.965 - 5.980 mm (0.2348 - 0.2354 in)
Exhaust : 5.945 - 5.960 mm (0.2341 - 0.2346 in)
SEM938C
Standard
Intake and Exhaust : 6.000 - 6.018 mm (0.2362 - 0.2369 in)
Valve guide clearance:
Standard
Intake : 0.020 - 0.053 mm (0.0008 - 0.0021 in)
Exhaust : 0.040 - 0.073 mm (0.0016 - 0.0029 in)
Limit
Intake : 0.08 mm (0.0031 in)
Exhaust : 0.10 mm (0.0039 in)
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EM-102
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lIf it exceeds the limit, replace valve and/or valve guide.
Valve Guide Replacement
When removing valve guide, replace it with oversized [0.2 mm (0.0008 in)] valve guide.
1. Heat cylinder head to 110 to 130°C(230to266°F) in oil bath.
2. Using the valve guide drift (commercial service tool), tap valve
guides out from the combustion chamber side.
WARNING:
Cylinder head contains heat, when working, wear protective
equipment to avoid getting burned.
3. Ream cylinder head valve guide hole with the valve guide
reamer (commercial service tool).
4. Heat cylinder head to 110 to 130°C(230to266°F) in oil bath.
SEM008A
SEM931C
Valve guide hole diameter (for service parts):
10.175 - 10.196 mm (0.4006 - 0.4014 in)
SEM932C
SEM008A
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5. Using the valve guide drift (commercial service tool), press fit
valve guides from camshaft side, referring to the dimension
showninthefigure.
WARNING:
Cylinder head contains heat, when working, wear protective
equipment to avoid getting burned.
6. Using the valve guide reamer (commercial service tool), perform
reaming to the press-fitted valve guides.
Valve Seat Contact
lBefore starting this check, confirm that the dimension of valve
guide and valves are as specified.
lApply red lead primer on contacting surfaces of valves seat and
of valve face to examine the conditions of contacting surfaces.
lMake sure that the paint on contacting surfaces is continuous
along the entire circumference.
lIf there are abnormal indications, grind the valve and check the
contact again. If malfunction indications still persist, replace
valve seat.
Valve Seat Replacement
When removing valve seat, replace it with oversized [0.5 mm (0.020 in)] valve seat.
1. Bore out old seat until it collapses. Boring should not continue beyond the bottom face of the seat recess
in cylinder head. Set the machine depth stop to ensure this. Refer toEM-139, "
Valve Seat".
2. Ream cylinder head recess diameter for service valve seat.
lBe sure to ream in circles concentric to the valve guide center.
lThis will enable valve seat to fit correctly.Projection “L” : 10.4 - 10.6 mm (0.409 - 0.417 in)
PBIC2497E
Reaming specifications:
Intake and Exhaust
6.000 - 6.018 mm (0.2362 - 0.2369 in)
SEM932C
SBIA0322E
Oversize [0.5 mm (0.020 in)]:
Intake : 30.500 - 30.516 mm (1.2008 - 1.2014 in)
Exhaust : 29.500 - 29.516 mm (1.1614 - 1.1620 in)
SEM795A
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3. Heat cylinder head to approximately 110 to 130°C(230to
266°F) in oil bath.
4. After cooling valve seats sufficiently with dry ice, press fit it to
cylinder head.
WARNING:
Cylinder head contains heat, when working, wear protective
equipment to avoid getting burned.
CAUTION:
Do not touch the cooled valve seats directly by hand.
5. Using the valve seat cutter set (commercial service tool), finish
processing referring to the dimensions shown in the figure.
Refer toEM-139, "
Va l v e S e a t".
CAUTION:
When using the valve seat cutter set, grasp cutter handle
with both hands, press cutter onto contacting face all
around, and cut thoroughly. If cutter is pressed unevenly or
repeatedly, the valve seat surface may be damaged.
6. Using compound, perform valve fitting.
7. Check again to make sure that contacting status is satisfactory.
For details, Refer toEM-103, "
Valve Seat Contact".
8. Use the depth gauge to measure the distance between the
mounting surface of cylinder head spring seat and the valve
stem end. If the distance is shorter than specified, repeat step 5
above to adjust it. If it is longer, replace valve seat with a new
one.
Valve Spring Square
lPosition the try square to valve spring, turn the spring, and mea-
sure the maximum clearance value between top surface of
spring and the try square.
lIf it exceeds the limit, replace valve spring.
SEM008A
SEM934C
Valve seat resurface limit “L”:
Intake : 36.53 - 36.98 mm (1.4382 - 1.4559 in)
Exhaust : 36.53 - 37.01 mm (1.4382 - 1.4571 in)
JEM253G
Limit : 1.9 mm (0.075 in)
PBIC0080E
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Valve Spring Dimensions and Valve Spring Pressure Load
lUsing valve spring tester, check the following.
lIf out of the standard, replace the valve spring.Standard:
Free height : 44.74 mm (1.76 in)
Installation height : 32.82 mm (1.2921 in)
Installation load : 184 - 208 N
(18.77 - 21.22 kg, 41.4 - 46.8 lb)
Height during
valve open: 24.82 mm (0.9772 in)
Load with valve
open:320-360N
(32.65 - 36.73 kg, 71.9 - 80.9 lb)
SEM113
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ENGINE ASSEMBLY
PFP:10001
ComponentsEBS01EV6
Removal and InstallationEBS01E6D
WARNING:
lSituate vehicle on a flat and solid surface.
lPlace chocks at front and back of rear wheels.
lFor engines not equipped with engine slingers, attach proper slingers and bolts described in
PARTS CATALOG.
CAUTION:
lAlways be careful to work safely, avoid forceful or uninstructed operations.
lDo not start working until exhaust system and engine coolant are cool enough.
lIf items or work required are not covered by the engine main body section, refer to the applicable
sections.
lAlways use the support point specified for lifting.
lUse either 2-pole lift type or separate type lift as best you can. If board-on type is used for
unavoidable reasons, support at the rear axle jacking point with transmission jack or similar tool
before starting work, in preparation for the backward shift of center of gravity.
1. RH engine mounting insulator 2. RH engine mounting bracket 3. LH engine mounting bracket
4. Heat insulator 5. LH engine mounting insulator 6. Transmission cross member
7.Engine mounting insulator (rear)
(4WD models)8.Engine mounting insulator (rear)
(2WD M/T models)9.Dynamic damper (2WD M/T mod-
els)
10.Engine mounting insulator (rear)
(2WD A/T models)11. Dynamic damper (2WD A/T models)
PBIC4096E