Piston Rings
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The 2N mark on 2nd compression ring must face upwards. The piston has a groove between 1st and 2nd compression rings to allow for expansion of blow-by gases. No ring is to be installed in this groove.
Measure piston ring end gap and side clearance. If not within specification, replace piston and/or rings as necessary. See PISTONS, PINS & RINGS table under ENGINE SPECIFICATIONS. Install rings with mark on ring facing upward. Position ring end gaps on piston. See Fig 1.