Nissan ENGINE - Page 93

CYLINDER HEAD
EM-93
< REMOVAL AND INSTALLATION >
[VQ40DE]
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6. Remove valve oil seals using Tool.
7. If valve seat must be replaced, refer to EM-94, "Inspection After Disassembly"
.
8. If valve guide must be replaced, refer to EM-94, "Inspection After Disassembly"
.
9. Remove spark plug tube, as necessary.
• Pull spark plug tube out of cylinder head using a suitable tool.
CAUTION:
• Take care not to damage cylinder head.
• Once removed, spark plug tube will be deformed and cannot be reused. Do not remove it unless
absolutely necessary.
ASSEMBLY
1. When valve guide is removed, install it. Refer to EM-94, "Inspection After Disassembly".
2. When valve seat is removed, install it. Refer to EM-94, "Inspection After Disassembly"
.
3. Install valve oil seals using Tool.
4. Install valve spring seat.
5. Install valves.
• Install it in the original position.
NOTE:
Larger diameter valves are for intake side.
6. Install valve spring (uneven pitch type).
• Install narrow pitch end (paint mark) to cylinder head side
(valve spring seat side).
7. Install valve spring retainer.
Tool number : KV10107902 (J-38959)
WBIA0489E
Tool number : — (J-39386)
Height (H) (Without valve spring seat installed)
Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
WBIA0490E
SEM085D
Revision: January 2013 2013 Xterra