Impreza RS Coupe AWD F4-2.5L SOHC (1999)
Piston Ring: Specifications
Number of Rings
2 Compression, 1 Oil
Top Ring End Gap (STD)
0.20-0.35 mm
Top Ring End Gap (Limit)
1.0 mm
Second Ring End Gap (STD)
0.37-0.52 mm
Second Ring End Gap (Limit)
1.0 mm
Oil Ring End Gap (STD)
0.20-0.50 mm
Oil Ring End Gap (Limit)
1.0 mm
Clearance Between Ring and Groove, Top Ring (STD)
0.040-0.080 mm
Clearance Between Ring and Groove, Top Ring (Limit)
0.15 mm
Clearance Between Ring and Groove, Second Ring (STD)
0.030-0.070 mm
Clearance Between Ring and Groove, Second Ring (Limit)
0.15 mm
