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

Piston Diameter
Measure on skirt 40 mm (1.57 in) down from face of piston dome.
Coded Red 3.7780-3.7785 Inch (in)
Coded Blue 3.7785-3.7790 Inch (in)
Coded Yellow 3.7790-3.7795 Inch (in)
Piston-to-Bore Clearance (Select Fit) 0.001-0.002 Inch (in)
Service Piston Selection Bore Size
Use bore measurement perpendicular to crank centerline.
3.7795-3.7800 inch Red
3.7800-3.7805 inch Blue
3.7805-3.7810 inch Yellow
Pin Bore Diameter 0.9126-0.9128 Inch (in)
Ring Groove Width Compression (Top) 0.0600-0.0605 Inch (in)
Compression (Bottom) 0.0600-0.0605 Inch (in)
Oil 0.1193-0.1203 Inch (in)