Inspect each valve for turning, burning, scratches or
abnormal stem wear.
Check the valve movement in the guide.
Measure and record each valve stem O.D.
SERVICE LIMITS: 4.90 mm
Measure and record the valve guide I.D.
SERVICE LIMITS: IN / EX
5.30 mm
Calculate the stem-to-guide clearance.
SERVICE LIMITS: IN
0.08 mm
EX 0.10
mm
NOTE: If the stem-to-guide clearance exceeds the
service limits, determine if a new guide with
standard dimensions would bring the clearance
within tolerance.
If so, replace guides as necessary and ream to fit.
If the valve guide is replaced, the valve seat must
be replaced.
CYLINDER HEAD ASSEMBLY
Lubricate each valve stem with oil.
Insert the valves into guides.
Install the valve springs, retainers and the cotters.
NOTE: To prevent loss of tension, don’t compress the
valve springs more than necessary.
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