Product Description
The CUMMINS 3920691 OEM PISTON PIN RETAINING RING is a genuine Cummins replacement wrist pin retaining clip designed for 1989-2007 Dodge Ram 5.9L Cummins diesel engines. This OEM retaining ring secures the piston pin within the piston assembly to help maintain proper connecting rod alignment and reliable engine operation.
During engine rebuilds or piston service, piston pin retaining clips should always be carefully inspected and replaced if damaged, worn, or distorted. Genuine Cummins retaining rings are manufactured to precise OEM specifications for proper fitment, retention strength, and long-term durability in demanding diesel applications.
The Cummins 3920691 retaining ring is commonly used during piston replacement, engine overhauls, connecting rod service, and complete Cummins engine rebuilds.
FEATURES
- Genuine Cummins OEM piston pin retaining ring
- Secures wrist pin within piston assembly
- Fits 1989-2007 5.9L Cummins diesel engines
- OEM-quality spring tension and fitment
- Helps maintain proper piston and rod alignment
- Ideal for engine rebuilds and piston service
- Direct replacement for factory retaining clip
FITMENT
- 1989-1993 Dodge Ram D250/D350/W250/W350 5.9L Cummins 12V
- 1994-1998 Dodge Ram 2500/3500 5.9L Cummins 12V
- 1998.5-2002 Dodge Ram 2500/3500 5.9L Cummins 24V
- 2003-2007 Dodge Ram 2500/3500 5.9L Cummins Common Rail
Fitment Note: Multiple retaining rings are required per engine. Verify piston and wrist pin configuration before ordering.
WHAT'S INCLUDED
- 1 Cummins 3920691 OEM piston pin retaining ring
CROSS-REFERENCE & RELATED PRODUCTS
- CUMMINS 3904166 OEM PISTON PIN
- MAHLE 224-3461WR PISTON SET
- ARP 247-6303 PRO SERIES ROD BOLT KIT
- CUMMINS ENGINE INTERNAL PARTS
WHY REPLACE PISTON PIN RETAINING RINGS?
Piston pin retaining rings are critical engine components that prevent wrist pin movement inside the piston assembly. Damaged or improperly installed retaining clips can lead to severe engine damage, cylinder wall scoring, and piston failure. Replacing retaining rings during engine service helps maintain long-term engine reliability and proper piston operation.
SPECIFICATIONS
| Specification | Details |
|---|---|
| Manufacturer | Cummins |
| Part Number | 3920691 |
| Component Type | Piston pin retaining ring / wrist pin clip |
| Engine Compatibility | 5.9L Cummins 12V & 24V |
| Fitment Years | 1989-2007 |
| Configuration | OEM snap ring style retaining clip |
| Application | Engine rebuilds, piston service, maintenance |
| Condition | New Genuine Cummins OEM Part |
| Prop 65 | Warning: Cancer and Reproductive Harm — www.P65Warnings.ca.gov. |
FAQ
What does the piston pin retaining ring do?
The retaining ring secures the wrist pin inside the piston assembly and prevents the pin from moving laterally during engine operation.
Is Cummins 3920691 a genuine OEM part?
Yes. Cummins 3920691 is a genuine OEM piston pin retaining ring manufactured to factory specifications.
Should retaining clips be replaced during an engine rebuild?
Yes. Replacing piston pin retaining rings during piston or engine service is strongly recommended to help ensure proper retention and long-term reliability.
How many retaining rings are needed per engine?
Multiple retaining rings are required per engine because each piston uses retaining clips on both sides of the wrist pin assembly.
