EM-94
< REMOVAL AND INSTALLATION >
[VQ40DE]
CYLINDER HEAD
8. Install valve collet.
• Compress valve spring using Tool, attachment and adapter
using Tool. Install valve collet with magnet hand.
CAUTION:
When working, take care not to damage valve lifter holes
or valve stems.
• Tap valve stem edge lightly with plastic hammer after installa-
tion to check its installed condition.
9. Install valve lifter.
• Install it in the original position.
10. Install spark plug tube.
• Press-fit spark plug tube as follows:
a. Remove old liquid gasket adhering to cylinder head mounting hole.
b. Apply sealant to area within approximately 12 mm (0.47 in) from edge of spark plug tube press-fit side.
Use Genuine High Strength Locking Sealant or equivalent. Refer to GI-17, "Recommended Chemi-
cal Products and Sealants".
c. Press-fit spark plug tube so that its height (H) is as specified
using suitable drift.
CAUTION:
• When press-fitting, take care not to deform spark plug
tube.
• After press-fitting, wipe off liquid gasket protruding onto
cylinder-head upper face.
11. Install spark plug. Refer to EM-16, "Removal and Installation"
.
Inspection After Disassembly INFOID:0000000008799000
VALVE DIMENSIONS
• Check dimensions of each valve. Refer to EM-129, "Standard and Limit".
• If dimensions are out of the standard, replace valve and check the valve seat contact.
VALVE GUIDE CLEARANCE
Valve Stem Diameter
Measure the diameter of valve stem with micrometer.
Valve Guide Inner Diameter
Measure the inner diameter of valve guide with inside micrometer.
Tool numbers : KV10109220 ( — )
: KV10116200 (J-26336-B)
: KV10115900 (J-26336-20)
WBIA0578E
Standard press-fit height (H)
: 38.1 - 39.1 mm (1.500 - 1.539 in)
PBIC2638E
Standard
Intake : 5.965 - 5.980 mm (0.2348 - 0.2354 in)
Exhaust : 5.955 - 5.970 mm (0.2344 - 0.2350 in)
SEM938C
Revision: January 2013 2013 Xterra
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