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







Piston Diameter Coded Red 88.962-88.978 mm (3.5024-3.5031 in.)
Piston Diameter Coded Blue 88.988-89.004 mm (3.5035-3.5041 in.)
Piston Diameter Coded Yellow 89.014-89.030 mm (3.5045-3.5051 in.)
Piston-to-Bore Clearance 0.030-0.050 mm (0.00120.0023 in.)
Piston-to-Bore Clearance Service Limit 0.081 mm Maximum
Piston Bore Diameter 89.009-89.035 mm (3.5043-3.5053 in.) Red Piston Grade Required
Piston Bore Diameter 89.035-89.060 mm (3.5053-3.5063 in.) Blue Piston Grade Required
Piston Bore Diameter 89.060-89.086 mm (3.5063-3.5073 in.) Yellow Piston Grade Required
Compression Ring Groove Width (Top) 1.530-1.555 mm (0.0602-0.0612 in.)
Compression Ring Groove Width (Bottom) 1.530-1.555 mm (0.0602-0.0612 in.)
Oil Ring Groove Width 4.030-4.055 mm (0.1587-0.1596 in.)