Piston Ring, Engine

S52 3.2L Piston Rings

1st groove (plain compression ring)
End clearance	mm	0.25 - 0.40
End float	mm	0.03 - 0.065
2nd groove - tapper face ring
End clearance	mm	0.2 - 0.4
End float	mm	0.02 - 0.055
3rd groove - oil ring (scraper w/hose-spring)
End clearance	mm	0.25 - 0.50
End float	mm	0.020 - 0.055