911 Turbo Coupe F6-3299cc 3.3L SOHC Turbo (1988)
Piston Ring: Specifications
End Gap
Compression Ring, Groove 1
0.2-0.4 mm
Wear Limit: 0.8 mm
Scraper Ring, Groove 2
0.2-0.4 mm
Wear Limit: 1.0 mm
Oil Ring, Groove 3
0.3-0.6 mm
Wear Limit: 2.0 mm
Groove Clearance Compression Ring, Groove 1
0.070-0.102 mm
Wear Limit: 0.2 mm
Scraper Ring, Groove 2
0.040-0.072 mm
Wear Limit: 0.2 mm
Oil Ring, Groove 3
0.020-0.052 mm
Wear Limit: 0.1 mm