Piston Ring, Engine

PISTON RING GAP & GROOVE CLEARANCE

Ring End Gap
Top Compression Ring 0.18-0.38 mm (0.007-0.015 in.)
Second Compression Ring 0.28-0.57 mm (0.011-0.022 in.)
Oil Control (Steel Rails) 0.23-0.78 mm (0.009-0.030 in.)

Ring Side Clearance
Top Compression Ring 3.3L 0.030-0.080 mm (0.0012-0.0031 in.)
Top Compression Ring 3.8L 0.030-0.069 mm (0.0012-0.0027 in.
Second Compression Ring 3.3L 0.030-0.095 mm (0.0012-0.0037 in.)
Second Compression Ring 3.8L 0.041-0.085 mm (0.0016-0.0033 in.)
Oil Ring (Steel Ring) 0.039-0.200 mm (0.0015-0.0078 in.)