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)

Or, hide this message: temporarily or permanently

Piston, Engine



Cylinder Bore inner Diameter





^ Using a bore gauge, measure cylinder bore for wear, out-of-round and taper at six different points on each cylinder. [(A) and (B) directions at (C), (D) and (E)] is in longitudinal direction of engine.
f. 10 mm (0.39 in)
g. 60 mm (2.36 in)
h: 120 mm (4.72 in)

Re-boring Cylinder Bore

Honing allowance 0.02 mm (0.0008 in)





AVAILABLE PISTON

Part 1:




Part 2:





PISTON RING





PISTON PIN