C 2500 Suburban 2WD V8-454 7.4L VIN J SFI (1998)
Piston Ring: Specifications
Piston Ring Compression
Top Groove Production Clearance .................................................................................................................. 0.031-0.074 mm (0.0012-0.0029 inch)
Second Groove Production Clearance ............................................................................................................. 0.031-0.074 mm (0.0012-0.0029 inch)
Service Limit Groove Clearance ................................................................................................................... 0.0991-0.305 mm (0.0012-0.0039 inch)
Top Ring Production Gap ................................................................................................................................... 0.254-0.457 mm (0.010-0.018 inch)
Top Ring Service Limit Gap ............................................................................................................................... 0.254-0.711 mm (0.010-0.028 inch)
Second Ring Production Gap .............................................................................................................................. 0.406-0.609 mm (0.016-0.024 inch)
Second Ring Service Limit Gap .......................................................................................................................... 0.406-0.863 mm (0.016-0.034 inch)
Piston Ring Oil Control
Production Groove Clearance ......................................................................................................................... 0.127-0.165 mm (0.0050-0.0065 inch)
Service Limit Groove Clearance ..................................................................................................................... 0.127-0.191 mm (0.0050-0.0075 inch)
Production Gap ................................................................................................................................................... 0.254-0.762 mm (0.010-0.030 inch)
Service Limit Gap ............................................................................................................................................... 0.254-1.016 mm (0.010-0.040 inch)
