CUMMINS 3974127 OEM OIL COOLER-TO-FILTER HEAD GASKET – ISB 6.7L (2007.5–2024)

Product Description

The Cummins 3974127 OEM Oil Cooler-to-Filter Head Gasket is the factory-engineered sealing gasket used between the oil cooler assembly and oil filter head on all 2007.5–2024 ISB 6.7L Cummins engines. This gasket prevents oil seepage, ensures correct lubrication flow, and maintains long-term sealing even under high thermal cycling. When servicing an oil cooler, repairing leaks, or replacing a filter head, a genuine Cummins gasket is the only choice for OE-level reliability and perfect fitment.

Fitment

• 2007.5–2024 Ram 2500 / 3500 / 4500 / 5500 with 6.7L ISB Cummins
• ISB 6.7L B-Series engines (on-road and industrial) using OEM oil cooler/filter head interface

Note: Some industrial applications may use alternate configurations—verify by ESN for exact compatibility.

Cross-Reference (Cummins-Only)

Related Cummins lubrication-system components:
• Cummins 3915787 Threaded Plug – Oil Filter Housing
• Cummins 3900625 Hex Flange Head Cap Screw
• Cummins 3900267 Tappet Cover Bolt Grommet Seal

FAQ

What does the Cummins 3974127 gasket seal?

This gasket seals the interface between the oil cooler and the oil filter head, preventing oil leaks and maintaining correct internal flow.

When should this gasket be replaced?

Replace whenever removing the oil cooler or filter head, or if any seepage is detected around the assembly. Cummins recommends using a new gasket every time during service.

Does this fit all 6.7L Cummins years from 2007.5 to 2024?

Yes. The 3974127 gasket is used across all ISB 6.7L engines in Ram trucks and many B-Series applications.

Is this gasket compatible with aftermarket oil coolers?

It is designed specifically for the OEM Cummins oil cooler and filter head. Aftermarket compatibility varies and cannot be guaranteed.

Specifications for cummins 3974127