CYLINDER HEAD
EM-89
C
D
E
F
G
H
I
J
K
L
M
A
EM
Revision; 2004 April
2003 Murano
6.
Remove valve oil seals using valve oil seal puller (special ser-
vice tool).
7.
Remove valve spring seat.
8.
If valve seat must be replaced, refer to
EM-92, "VALVE SEAT
REPLACEMENT"
.
9.
If valve guide must be replaced, refer to
EM-90, "VALVE GUIDE
REPLACEMENT"
.
10. Remove spark plug tube, as necessary.
●
Using a pair of pliers, pull spark plug tube out of cylinder
head.
CAUTION:
●
Take care not to damage cylinder head.
●
Once removed, a spark plug tube will be deformed and cannot be reused. Do not remove it
unless absolutely necessary.
Inspection After Disassembly
ABS003MP
CYLINDER HEAD DISTORTION
●
At each of several locations on bottom surface of cylinder head,
measure distortion in six directions.
●
If it exceeds the limit, replace cylinder head.
VALVE DIMENSIONS
●
Check dimensions of each valve. For dimensions, refer to
EM-
126, "VALVE"
.
VALVE GUIDE CLEARANCE
Valve Guide Stem Diameter
●
Measure outer diameter of valve stem with micrometer.
Valve Guide Inner Diameter
●
Measure inner diameter of valve guide with inside micrometer.
PBIC0884E
Limit
: 0.1mm (0.004 in)
SEM861E
SEM188A
Standard
Intake
: 59.65 - 59.80 mm (0.2348 - 0.2354 in)
Exhaust
: 59.55 - 59.70 mm (0.2344 - 0.2350 in)
Standard
Intake and
Exhaust
: 6.000 - 6.018 mm (0.2362 - 0.2369 in)
SEM938C