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

Clearance in the Bore (48 mm from top of piston) Compression Height 1.179-1.183
Factory Specification 0.00055-0.00087 inch
Service Specification 0.0010-0.0031 inch
Piston Diameter at 70°F (21°C) (48 mm from top of piston) Factory Specification 3.5426-3.5435 inch
Service Specification 0.0010-0.0031 inch
Piston Pin Bore ID at 70°F (21°C) 0.8662-0.8664
Ring Groove Width, Oil 0.1197-0.1205
Ring Groove Width, Second Compression 0.0598-0.0606
Ring Groove Width, Top Compression 0.048-0.049
Weight Less Pin and Rings 12.346 +/- 0.176 oz