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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Piston Ring, Engine

PISTON RING

Ring Gap:
Top Ring 0.30-0.46 mm (0.012-0.018 in.)
Intermediate 0.82-1.18 mm (0.032-0.047 in.)
Oil Control 0.22-0.58 mm (0.010-0.023 in.)

Ring Groove Clearance:
The clearance for the top piston ring can be measured accurately with a typical feeler gauge

Intermediate
(Min) 0.040 mm (0.0016 in.)
(Max) 0.110 mm (0.0043 in.)

Oil Control
(Min) 0.040 mm (0.0016 in.)
(Max) 0.085 mm (0.0033 in.)