Section 02 ENGINE
Subsection 10 (CYLINDER HEAD)
NOTE:
Valve cotters must be properly engaged in
valve stem grooves.
1
R1503motr105B
1. Position of the valve spring
VALVES
Valve Removal
Remove valve spring.
Push valve stem then pull valves out of valve
guides.
R1503motr106A
1
2
1. Intake valve 38 mm
2. Exhaust valve 31 mm
Remove valve stem seal with a valve stem seal
pliers such as the
SNAP-ON VALVE STEM SEAL PLI-
ERS (P/N YA8230)
.
R610motr125A
Valve Inspection
Valve Stem Seal
Inspection of valve stem seals is not needed
because
NEW
seals should always be installed
whenever cylinder head is removed.
Valve
Inspect valve surface, check for abnormal stem
wear and bending. If so, replace by a new one.
Valve Stem and Valve Guide Clearance
Measure valve stem and valve guide in three
places, using a micrometer and a small bore
gauge.
NOTE:
Clean valve guide to remove carbon de-
posits before measuring.
Change valve if valve stem is out of specification
or has other damages such as wear or friction sur-
face.
smr2009-025
143
Содержание GTX Limited iS 255 2009
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