Related Photo Galleries
Piston-ring end gaps must be located initially at 45-degree intervals-9, 12, 3, and 6 o'clock. Ring end gaps should be checked on all eight cylinders prior to installation and at three positions-top, middle, and bottom. Another important issue is piston-ring side clearances; you need .002 inch on the top and second rings. This ensures proper oil control behind the ring for better sealing.