Piston Ring Fitting

PISTON RING FITTING





1. Wipe cylinder bore clean. Insert ring and push down with piston to ensure it is square in bore. The ring gap measurement must be made with the ring positioning at least 12 mm (0.50 in.) from bottom of cylinder bore. Check gap with feeler gauge (1). Top compression ring gap.40 to.55mm (.015in to.0217 in.). Second compression ring gap.25mm to.50mm (.0099 to.0197 in.). Oil control ring gap.20 to.40mm (.0079 to.0158 in.).
2. If ring gaps exceed dimension given, new rings, piston and cylinder boring may be necessary. Keep piston rings in piston sets.




3. Check piston ring to groove clearance. Top compression ring gap 0.12 to 0.16 mm (.0048 to.0063 in.) (A). Second compression ring gap 0.065 to 0.110 mm (.0026 to.0044 in.) (B). Oil control ring gap 0.03 to 0.07 mm (.0012 to.0028 in.) (C).