Product Description
Interstate-McBee M-3935878 Valve Cover Gasket – 98.5–02 5.9L Cummins 24-Valve
Quality replacement valve cover gasket for the 1998.5–2002 Dodge Ram 2500/3500 with the 5.9L Cummins 24-valve (ISB). Designed to seal the valve cover to the cylinder head and prevent oil leaks. Sold individually.
- Direct replacement: Built to OE form, fit, and function.
- Durable construction: Molded elastomer for long service life and reliable sealing.
- Leak fix: Restores proper sealing after valve cover removal or maintenance.
- Shop-friendly: Consistent fit for quick installs.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3935878 |
| OEM Reference* | 3935878 |
| Sold As | Each (1 gasket) |
| Position | Valve cover to cylinder head |
*OEM number provided for reference only. Verify by engine serial number (ESN) when possible.
What’s Included
- (1) Valve cover gasket, P/N M-3935878
Vehicle Fitment
Always verify by ESN for best results.
- Dodge Ram 2500/3500 – 5.9L Cummins 24-valve (ISB)
- Model Years: 1998.5, 1999, 2000, 2001, 2002
Install Notes
- Clean both mating surfaces; remove old gasket material and oil residue.
- Install gasket dry unless otherwise specified by the Cummins service manual (no RTV on the sealing bead).
- Inspect valve cover and bolt grommets/seals; replace any hardened or cracked pieces.
- Tighten fasteners evenly in a criss-cross pattern to the service-manual torque spec.
Why Buy From CPP Diesel
- ESN-verified fitment assistance from diesel specialists
- Fast shipping and easy returns
- Large inventory of complementary ISB top-end parts
FAQ
Will this fit my 1998 Ram?
This gasket fits the mid-year change 1998.5–2002 24-valve ISB engines, not the early 12-valve. If your truck is early-1998 (12-valve), this is not the correct part.
How many do I need?
One gasket per engine. Replace any damaged bolt grommets or pass-through seals during service.
Do I need sealant?
Generally no; install the molded gasket dry unless your service manual calls for a dab at joints or corners.
