Product Description
Interstate-McBee M-3959052 Oil Pan Gasket – 1989–1998 5.9L Cummins 12-Valve
Direct-fit replacement oil pan gasket for the 1989–1998 Dodge Ram 2500/3500 with the 5.9L Cummins 12-valve (6BT). Designed to seal reliably and resist oil, heat, and vibration under everyday and heavy-duty use. Sold individually.
- OE-style fit: Matches Cummins reference 3959052 for proper alignment and sealing.
- Durable construction: Quality aftermarket materials engineered for long service life.
- Leak defense: Consistent bead profile helps prevent seepage at the pan rail.
- Service ready: Ideal for oil pan reseal jobs or engine refreshes.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3959052 |
| OEM Reference | Cummins 3959052 |
| Application | Oil pan gasket |
| Sold As | Each (1 gasket) |
What’s Included
- (1) Oil pan gasket, P/N M-3959052
Vehicle Fitment
Always verify by engine serial number (ESN) when possible.
- Dodge Ram 2500/3500 5.9L Cummins (12-valve 6BT)
- Model Years: 1989–1998
- Other B-Series applications (4B/6B) where Cummins 3959052 is specified (confirm by ESN).
Install Notes
- Drain engine oil and remove the oil pan; clean all sealing surfaces thoroughly.
- Inspect the oil pan rail for bends; straighten as needed for uniform gasket compression.
- Install the gasket dry unless the service manual specifies a small dab of RTV at joints or corners.
- Torque pan bolts in a criss-cross pattern to factory spec; re-check after heat cycle if recommended.
- Refill with the correct oil and check for leaks.
Why Buy From CPP Diesel
- ESN-verified fitment support from diesel specialists
- Fast shipping, easy returns, competitive pricing
- Deep inventory of complementary B-series gaskets and hardware
FAQ
Will this fit my 1989–1998 5.9L Cummins?
Yes. This gasket covers the 12-valve 5.9L Cummins used in 1989–1998 Dodge Ram 2500/3500. For edge cases, verify by ESN.
Do I need RTV with this gasket?
Generally install the gasket dry. Some manuals call for a small dab of RTV at timing cover/block joints—follow the Cummins procedure.
How many are required?
One gasket per engine.
