Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Service Procedures






SIDE CLEARANCE
Check the clearance between the piston ring and ring groove. If the limit is exceeded, replace the ring or piston, or both.





END GAP
Insert a piston ring into the cylinder bore. Force it down with a piston, its crown being in contact with the ring, to correctly position it at right angle to the cylinder wall. Then, measure the end gap with a feeler gauge. If the end gap is excessive, replace the piston ring.