Nissan Primera P11. Instruction — part 394
CAMSHAFT RUNOUT
NCEM0019S03
1.
Measure camshaft runout at the center journal.
Runout (Total indicator reading):
Standard
Less than 0.02 mm (0.0008 in)
Limit
0.1 mm (0.004 in)
2.
If it exceeds the limit, replace camshaft.
CAMSHAFT CAM HEIGHT
NCEM0019S04
1.
Measure camshaft cam height.
Standard cam height:
Intake
QG16DE
40.220 - 40.410 mm (1.5835 - 1.5909 in)
QG18DE
40.610 - 40.800 mm (1.5988 - 1.6063 in)
Exhaust
40.056 - 40.245 mm (1.5770 - 1.5844 in)
Cam wear limit:
0.20 mm (0.0079 in)
2.
If wear is beyond the limit, replace camshaft.
CAMSHAFT JOURNAL CLEARANCE
NCEM0019S05
1.
Install camshaft bracket and tighten bolts to the specified
torque.
2.
Measure inner diameter of camshaft bearing.
Standard inner diameter:
No. 1 bearing
28.000 - 28.021 mm (1.1024 - 1.1032 in)
No. 2 to No. 5 bearings
24.000 - 24.021 mm (0.9449 - 0.9457 in)
3.
Measure outer diameter of camshaft journal.
Standard outer diameter:
No. 1 journal
27.935 - 27.955 mm (1.0998 - 1.1006 in)
No. 2 to No. 5 journals
23.935 - 23.955 mm (0.9423 - 0.9431 in)
4.
If clearance exceeds the limit, replace camshaft and/or cylin-
der head.
Camshaft journal clearance:
Standard
SEM154D
SEM916F
Micrometer
SEM917F
Inside
micrometer
SEM156D
CYLINDER HEAD
QG
Inspection (Cont’d)
EM-35
0.045 - 0.086 mm (0.0018 - 0.0034 in)
Limit
0.15 mm (0.0059 in)
CAMSHAFT END PLAY
NCEM0019S06
1.
Install camshaft in cylinder head. Refer to EM-24.
2.
Measure camshaft end play.
Camshaft end play:
Standard
0.115 - 0.188 mm (0.0045 - 0.0074 in)
Limit
0.20 mm (0.0079 in)
3.
If limit is exceeded, replace camshaft and remeasure end play.
I
If limit is still exceeded after replacing camshaft, replace
cylinder head.
CAMSHAFT SPROCKET RUNOUT
NCEM0019S07
1.
Install sprocket on camshaft.
2.
Measure camshaft sprocket runout.
Runout (Total indicator reading):
Limit 0.15 mm (0.0059 in)
3.
If it exceeds the limit, replace camshaft sprocket.
VALVE GUIDE CLEARANCE
NCEM0019S08
1.
Measure valve deflection as shown in figure. (Valve and valve
guide wear the most in this direction.)
Valve deflection limit (Dial gauge reading):
Intake & Exhaust
0.2 mm (0.008 in)
SEM918F
Dial guage
SEM919F
SEM345D
Approx. 25 mm (0.98 in)
CYLINDER HEAD
QG
Inspection (Cont’d)
EM-36
2.
If it exceeds the limit, check valve to valve guide clearance.
a.
Measure valve stem diameter and valve guide inner diameter.
b.
Calculate valve to valve guide clearance.
Valve to valve guide clearance = Valve guide inner diam-
eter − Valve stem diameter.
c.
Check that clearance is within specification.
Unit: mm (in)
Standard
Limit
Intake
0.020 - 0.050
(0.0008 - 0.0020)
0.1 (0.004)
Exhaust
0.040 - 0.070
(0.0016 - 0.0028)
0.1 (0.004)
I
If it exceeds the limit, replace valve and remeasure clearance.
I
If limit is still exceeded after replacing valve, replace valve
guide.
VALVE GUIDE REPLACEMENT
NCEM0019S09
1.
To remove valve guide, heat cylinder head to 110 to 130°C
(230 to 266°F).
2.
Drive out valve guide with a press [under a 20 kN (2 ton, 2.2
US ton, 2.0 Imp ton) pressure] or hammer and suitable tool.
SEM938C
Micrometer
SEM008A
Oil
SEM931C
CYLINDER HEAD
QG
Inspection (Cont’d)
EM-37
3.
Ream cylinder head valve guide hole.
Valve guide hole diameter
(for service parts):
Intake & Exhaust
9.685 - 9.696 mm (0.3813 - 0.3817 in)
4.
Heat cylinder head to 110 to 130°C (230 to 266°F) and press
service valve guide into cylinder head.
Projection “L”:
11.5 - 11.7 mm (0.453 - 0.461 in)
5.
Ream valve guide.
Finished size:
Intake & Exhaust
5.500 - 5.515 mm (0.2165 - 0.2171 in)
VALVE SEATS
NCEM0019S10
Check valve seats for pitting at contact surface. Resurface or
replace if excessively worn.
I
Before repairing valve seats, check valve and valve guide
for wear. If they have worn, replace them. Then correct
valve seat.
I
Use both hands to cut uniformly.
REPLACING VALVE SEAT FOR SERVICE PARTS
NCEM0019S11
1.
Bore out old seat until it collapses. Set machine depth stop so
that boring cannot contact the bottom face of seat recess in
cylinder head.
2.
Ream cylinder head recess.
Reaming bore for service valve seat
Oversize [0.5 mm (0.020 in)]:
Refer to SDS, EM-182.
Use the valve guide center for reaming to ensure valve seat
will have the correct fit.
SEM932C
Suitable reamer
MEM096A
SEM932C
Suitable reamer
SEM934C
SEM795A
.
Recess diameter
CYLINDER HEAD
QG
Inspection (Cont’d)
EM-38
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