Valve Guides, Inspection
Tools:
9999683 Dial indicator (short probe)
9999696 Magnetic stand
1 Put the cylinder head on the bench, and put the
valves in the valve guides.
2
Measure the wear with 9999683 Dial indicator
(short probe) and 9999696 Magnetic stand.
Lift each valve about 2 mm (0.08") from its seat,
put the measurement tip on the valve seat rim and
check the wear.
Permissible clearance between valve and
valve guide:
Inlet valve, max clearance 0.20 mm (0.008")
Exhaust valve, max clearance 0.25 mm (0.010")
NOTICE! Since the valve guides are machined directly
in the cylinder head, the cylinder head must be
changed when the clearance is too great, even when
the valve is new.
21-4 Valve Mechanism
47701798 05-2013 © AB VOLVO PENTA 73
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