Product Description
The CUMMINS 3920691 OEM PISTON PIN RETAINING RING is designed for 1989–2007 5.9L Cummins diesel engines. This genuine Cummins retaining ring secures the piston pin (wrist pin) within the piston assembly and helps maintain proper engine operation during demanding diesel applications.
Use this part when rebuilding an engine, replacing pistons, servicing connecting rods, or repairing damaged piston pin retention components. Always verify fitment by engine serial number and part number before ordering.
FEATURES
- Genuine Cummins OEM piston pin retaining ring
- Designed for 1989–2007 5.9L Cummins applications
- Secures the piston pin within the piston assembly
- Direct-fit replacement component
- Ideal for engine rebuilds and piston service work
- Manufactured to Cummins OE specifications
FITMENT
- 1989–1993 Dodge Ram 5.9L Cummins
- 1994–1998 Dodge Ram 2500/3500 5.9L Cummins
- 1998.5–2002 Dodge Ram 2500/3500 5.9L Cummins 24V
- 2003–2007 Dodge Ram 2500/3500 5.9L Cummins Common Rail
- Select Cummins industrial and commercial 5.9L applications
WHAT'S INCLUDED
- 1 Cummins 3920691 OEM Piston Pin Retaining Ring
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3920691
- Piston pin (wrist pin) assemblies
- Piston and connecting rod service components
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3920691
- Part Type: Piston Pin Retaining Ring
- Engine Compatibility: 5.9L Cummins
- Fitment Years: 1989–2007
- Vehicle Application: Dodge Ram 2500 and 3500
- Condition: New
- Quantity: Sold Individually
FAQ
Will this part fit my truck?
This retaining ring fits the applications listed above. Always verify fitment using your engine serial number and part number before ordering.
What does this retaining ring do?
The retaining ring secures the piston pin, also known as the wrist pin, within the piston assembly to prevent lateral movement during engine operation.
Is this a genuine Cummins part?
Yes. Cummins 3920691 is a genuine OEM Cummins piston pin retaining ring.
What is included?
This listing includes one Cummins 3920691 piston pin retaining ring.
Should these be replaced during an engine rebuild?
Yes. Replacing piston pin retaining rings during piston or engine rebuild work is recommended to ensure proper piston pin retention and long-term reliability.
Do I need any related parts?
Inspect the pistons, wrist pins, connecting rods, bearings, and related engine components during installation and replace worn parts as needed.
