Standard Procedure - Piston Ring Fitting

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Piston Ring Identification

Courtesy of CHRYSLER GROUP, LLC

Determine the piston diameter and obtain the appropriate ring set. The piston rings can be identified as shown in the illustration.

Fig 2: Position Of Ring In Cylinder Bore
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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	0.35 - 0. 51 mm	(0.014 - 0.020 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.

Fig 3: Oil Control Ring, Expander & Piston
Courtesy of CHRYSLER GROUP, LLC
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.

Fig 4: Piston Ring Installation Tool
Courtesy of CHRYSLER GROUP, LLC
Install the intermediate piston ring in the second groove.
Install the top piston ring in the top groove.

Fig 5: Piston Ring Orientation
Courtesy of CHRYSLER GROUP, LLC
Install the piston rings with ring gaps 120 degrees apart. Do not position ring gaps over the wrist pin hole.