1. Ring end gap should be measured with piston ring positioned in cylinder bore at area where no piston ring wear exists. Ensure ring end gap is within specification. See PISTONS, PINS & RINGS table under ENGINE SPECIFICATIONS.
2. To check side clearance on No. 1 and 2 (upper) compression rings, use feeler gauge to measure clearance between piston ring and piston. Ensure side clearance is within specification. See PISTONS, PINS & RINGS table under ENGINE SPECIFICATIONS.
3.Install piston rings on piston, with identification mark on piston ring toward top of piston.
Ensure piston ring end gaps are properly positioned. See Fig. 135.