Product Description
Interstate-McBee M-3938156 Timing Gear Housing Gasket – 89–02 5.9L Cummins
Premium aftermarket timing gear housing (gear case) gasket engineered by Interstate-McBee to OEM dimensions for 1989–2002 Dodge Ram 2500/3500 5.9L Cummins engines (both 12-valve and early 24-valve ISB). Designed to restore proper sealing between the gear housing and engine block and help prevent oil leaks after front cover service.
- OEM-style fit: Direct replacement for Cummins 3938156.
- Service-ready: Replace whenever the gear housing/front cover is removed; gasket is not reusable.
- Dependable materials: Oil-resistant construction for long service life and consistent clamp load.
- Aftermarket value: Interstate-McBee quality at a price that beats OEM boxed parts.
Specifications
| Interstate-McBee P/N | M-3938156 |
|---|---|
| OEM Cross-Reference | Cummins 3938156 |
| Position | Gear housing (timing case) to engine block |
| Application Family | Cummins B / ISB 5.9L (12V & 24V) |
| Years | 1989–2002 (verify by ESN for edge cases) |
| Supersession | Replaces select earlier listings (e.g., Interstate-McBee M-3940182) |
| Includes | (1) Timing gear housing gasket |
Vehicle Fitment
Always verify by engine serial number (ESN) when possible.
- Dodge Ram 2500/3500 5.9L Cummins
- 1989–1998 12-Valve 6BT
- 1998.5–2002 24-Valve ISB
Installation Notes
- Clean mating surfaces thoroughly; remove all old gasket material and residue.
- Follow the Cummins service manual for alignment, sealant use (if specified), and torque sequence.
- Replace front crank seal and related O-rings if wear is evident during service.
Warranty
Interstate-McBee new engine parts include manufacturer warranty coverage. Contact us for terms and assistance with claims.
Why Buy From CPP Diesel
- Expert B-Series fitment support with ESN verification
- Fast shipping, easy returns, and real diesel techs on call
- Curated add-ons: front cover gaskets, seals, KDP kits, dowel pins, and more
FAQ
Will this gasket fit both 12V and 24V 5.9L engines?Yes. It’s listed for 1989–2002 5.9L B-Series (12V and early 24V ISB). Verify by ESN for swapped or mixed-year builds.
Is the gasket reusable?
No. Replace it any time the timing gear housing/front cover is removed to ensure proper sealing.
What other parts should I replace during this job?
Common add-ons include the front cover gasket, front crank seal (with or without sleeve), and the KDP/dowel pin fix if not yet performed.
What does this supersede?
Interstate-McBee notes supersession over select earlier listings such as M-3940182; compare by ESN and drawings before ordering.
Product Videos
Custom Field
YEAR 1989-2002
MAKE DODGE
ENGINE 5.9L
