Standard Procedure - Piston Ring Fitting
WARNING: This page is about a different car, the 2011 RAM Pickup and 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- Determine the piston diameter and obtain the appropriate ring set. The piston rings can be identified as shown in illustration.
1 - PISTON 2 - CYLINDER BORE 3 - DEPTH - Position each ring in the cylinder and use a piston (1) to square it with the bore at a depth (3) of 89.0 mm (3.5 in.).
PISTON RING GAP CHART TOP RING 0.30 - 0. 46 mm (0.012 - 0.018 in.) INTERMEDIATE RING 0.82 - 1.18 mm (0.032 - 0.047 in.) OIL CONTROL RING 0.22 - 0.58 mm (0.010 - 0.023 in.) - Use a feeler gauge to measure the piston ring gap.
1 - OIL CONTROL RING 2 - EXPANDER 3 - PISTON - The top surface of all of the compression rings are identified with the word TOP or the supplier's MARK. Assemble the rings with the word TOP or the supplier's MARK up.
- Lubricate the piston rings and piston ring grooves with clean CJ-4 engine oil.
- Position the oil ring expander (2) in the oil control ring (1) groove (bottom groove).NOTE:
There is no (TOP) mark on the oil ring.
- Install the oil control ring (1) with the end gap OPPOSITE the ends on the expander.
1 - PISTON RING INSTALLATION TOOL - Install the intermediate piston ring in the second groove.
- Install the top piston ring in the top groove.
1 - TOP RING 2 - INTERMEDIATE RING 3 - OIL CONTROL RING - Install the piston rings with ring gaps 120 degrees apart. Do not position ring gaps over the wrist pin hole.