Product Description
Cummins 3957203 — Valve Cover Bolt with Grommet (Captive Isolator Cap Screw)
MPN: 3957203 | Also Known As: captive isolator cap screw, valve cover mounting bolt, bolt with rubber isolator & washer | Sold: Individually (6 required)
Why This Part
- ✓ OE hardware with bonded rubber isolator for proper clamp load and sealing.
- ✓ Direct-fit for 2004.5–2005 Ram 5.9L ISB valve cover.
- ✓ Helps prevent oil seep/leaks at the valve cover.
- ✓ Durable OE finish and materials for long service life.
Quick Specs
| Type | Valve cover mounting bolt with rubber isolator & washer |
|---|---|
| OE Part # | 3957203 |
| Qty Required | 6 per engine (sold individually) |
| Finish | OE Cummins fastener with captive isolator |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2004.5–2005 | Ram 5.9L ISB (24V Common-Rail) | Ram 2500/3500 |
Notes: This hardware is specific to the mid-cycle 2004.5–2005 valve cover design. Other years may use different bolts/seals—verify by VIN/ESN.
Often Paired With
- Valve Cover Gasket: year/engine specific (verify by VIN)
- Additional Bolts: order qty 6 for a complete set
- Brake cleaner & lint-free towels to prep sealing surfaces
What’s In The Box
- (1) Genuine Cummins Valve Cover Bolt with Rubber Isolator & Washer (3957203)
Install Tips
- Clean the seating area and gasket; replace any damaged gaskets.
- Install bolts finger-tight, then torque in a cross pattern to factory spec.
- Recheck for seepage after first heat cycle.
FAQ
WILL THIS FIT MY 2004.5–2005 5.9L CUMMINS RAM?Yes—this is the OE valve cover bolt with isolator used on most mid-2004.5–2005 5.9L ISB applications (verify by VIN/ESN).
HOW MANY DO I NEED?Six bolts are required for a complete set. This item is sold individually—order quantity 6 if replacing all.
DOES IT INCLUDE THE RUBBER ISOLATOR/GROMMET?Yes—this captive design includes the bonded rubber isolator and washer for proper sealing and clamp load.
WHAT ABOUT OTHER YEARS (2003–2004 OR 2006–2007)?Those years may use different hardware and/or seals. Always verify by VIN/ESN or compare to your original bolt.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3957203 built to factory specifications.
