Product Description
Genuine Cummins
Cummins 3904849 — Timing Pin Retaining Ring
MPN: 3904849 | Also Known As: timing pin circlip, retaining ring | Function: Secures the timing pin in the timing pin housing
Why This Part
- ✓ OE fit—correct tension and profile to hold the timing pin securely.
- ✓ Direct replacement for worn, bent, or missing retaining ring.
- ✓ Prevents timing drift from an unsecured pin/housing.
- ✓ Durable spring steel construction to resist fatigue.
OE Fit Stock Replacement 1 Per Engine
Quick Specs
| Type | Timing pin retaining ring (circlip) |
|---|---|
| OE Part # | 3904849 |
| Qty Required | 1 per engine (sold individually) |
| Often Paired | Timing Pin 3903924 · O-Ring 3913994 · Housing 3919683 |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1989–1998 | 5.9L Cummins (12-Valve 6BT) | D/W 250/350 (’89–’93), Ram 2500/3500 (’94–’98) |
Notes: Matches OE timing pin assembly on 12-valve applications. For late-’98.5+ 24-valve (VP44) trucks, confirm by VIN/ESN as components differ.
Often Paired With
- Timing Pin: Cummins 3903924
- Timing Pin O-Ring: Cummins 3913994
- Timing Pin Housing: Cummins 3919683
What’s In The Box
- (1) Genuine Cummins Timing Pin Retaining Ring (3904849)
Install Tips
- Use proper snap-ring pliers; avoid stretching the ring beyond its elastic limit.
- Ensure the ring seats fully in the housing groove and the pin moves freely.
- Inspect pin, O-ring, and housing; replace worn parts to prevent leaks or misalignment.
FAQ
WILL THIS FIT MY 1989–1998 5.9L CUMMINS?Yes—this ring retains the timing pin on 5.9L 12-valve applications from 1989–1998 (verify by VIN/ESN).
WHAT DOES THIS RING DO?It locks the timing pin into the timing pin housing so it can be engaged safely for engine timing checks.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3904849 with correct spring tension and profile.
WHAT OTHER PARTS SHOULD I REPLACE AT THE SAME TIME?The timing pin (3903924) and its O-ring (3913994) are commonly replaced together; inspect the housing (3919683) too.
WILL THIS WORK ON 24-VALVE (1998.5+) ENGINES?Some components changed with the 24-valve VP44 engines—confirm by VIN/ESN before ordering.
Product Videos
Custom Field
Vehicle Year 1994-1998
Vehicle Make DODGE
ENGINE 5.9L CUMMINS
