Nissan Frontier D22. Instruction — part 700
CYLINDER HEAD
EM-107
[VG33E and VG33ER]
C
D
E
F
G
H
I
J
K
L
M
A
EM
11. Remove both of the camshaft sprockets.
12. Remove the rear timing belt cover.
13. Remove the distributor and ignition wires.
CAUTION:
After removing the distributor from the cylinder head, do not rotate the distributor rotor.
14. Remove the harness clamp from RH rocker cover.
15. Remove the front exhaust tube from the exhaust manifold. Refer to
EX-3, "Removal and Installation"
16. Remove the A/C compressor and generator. Refer to
MTC-67, "Removal and Installation for Compressor"
(A/C compressor),
17. Remove the power steering pump. Refer to
18. Remove the A/C compressor, generator, and power steering
pump brackets.
19. Loosen and remove the bolts from both rocker covers in the
order shown. Remove both rocker covers.
20. Remove the cylinder head with exhaust manifold, loosen the
bolts in the numerical order as shown.
●
A warped or cracked cylinder head could result from not
removing the cylinder head bolts in the specified numerical
order.
●
Loosen the cylinder head bolts in two or three steps.
SEM819C
AEM416
SEM317F
SEM926AA
EM-108
[VG33E and VG33ER]
CYLINDER HEAD
Disassembly
EBS00GTN
CAUTION:
●
When installing sliding parts such as rocker arms, camshafts and oil seals, be sure to apply new
engine oil on the sliding surfaces.
●
When tightening cylinder head bolts and rocker shaft bolts, apply new engine oil to thread por-
tions and seat surfaces of bolts.
●
Do not disassemble hydraulic valve lifter.
●
Attach tags to the valve lifters so they are installed in their original positions.
●
If hydraulic valve lifter is kept on its side, there is a risk of
air entering it. After removal, always set hydraulic valve
lifter straight up, or when laying it on its side, have it soak
in new engine oil.
1.
Remove exhaust manifolds from cylinder head, loosen the bolts
in the numerical order as shown.
SEM870BA
LBIA0323E
CYLINDER HEAD
EM-109
[VG33E and VG33ER]
C
D
E
F
G
H
I
J
K
L
M
A
EM
2.
Remove the rocker shafts with the rocker arms.
●
Loosen the bolts in two or three steps.
3.
Remove the hydraulic valve lifters and lifter guide.
●
Hold the hydraulic valve lifters with wire so that they will not
drop out of the lifter guide.
4.
Remove the oil seal and camshaft.
●
Before removing the camshaft, measure the camshaft end play. Refer to
.
5.
Remove the valve components using Tool as shown.
WBIA0192E
SEM304A
SEM257A
EM-110
[VG33E and VG33ER]
CYLINDER HEAD
6.
Remove the valve oil seals using Tool or suitable tool.
Inspection
EBS00GTO
CYLINDER HEAD DISTORTION
1.
Measure the cylinder head sealing surface using a straight edge
and a feeler gauge as shown. If the surface flatness is beyond
the specified limit, resurface it or replace it as necessary.
NOTE:
The resurfacing limit of the cylinder head is determined by the
amount of cylinder block resurfacing necessary.
Resurfacing limit:
Amount of cylinder head resurfacing is “A”.
Amount of cylinder block resurfacing is “B”.
2.
After resurfacing cylinder head, check the nominal cylinder head height is within specification. Check that
the camshaft rotates freely by hand. If resistance is felt, the cylinder head must be replaced.
CAMSHAFT VISUAL CHECK
Check camshaft for scratches, seizure and wear. Replace as necessary.
CAMSHAFT RUNOUT
1.
Support the camshaft at the No. 2 and No. 4 camshaft journals.
2.
Measure camshaft runout at the No. 3 journal as shown.
3.
If the measured runout exceeds the limit, replace the camshaft.
CAMSHAFT CAM HEIGHT
1.
Measure the camshaft cam height as shown.
2.
If the measured wear is beyond the limit, replace the camshaft.
SEM285A
Head surface flatness
: less than 0.1 mm (0.004 in)
Maximum resurfacing limit (A + B)
: 0.2 mm (0.008 in)
Nominal cylinder head height
: 106.8 - 107.2 mm (4.205 - 4.220 in)
SEM868A
Runout limit (total indicator
reading)
: 0.1 mm (0.004 in)
WBIA0235E
Standard cam height
for intake and exhaust
: 38.943 - 39.133 mm
(1.5332 - 1.5407 in)
Cam wear limit
: 0.15 mm (0.0059 in)
SEM549A
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