MAHLE CS4961 LOWER ENGINE GASKET SET FOR 1989–1998 3.9L 4BT CUMMINS ENGINE

Product Description

Seal the bottom end of your 4-cylinder diesel with the MAHLE CS4961 lower engine gasket set, engineered for the 1989-1998 Cummins 3.9 L 4BT (B-Series) engine. This conversion lower set includes the oil pan gasket, timing/front cover gasket, rear main housing gasket, and all essential water/oil passage seals for a full rebuild of the lower end with OE-grade reliability.

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Fitment

• 1989-1998 Cummins 3.9 L 4BT (4B3.9) industrial, commercial, and swap applications

Cross-Reference / Alternatives (Mahle on CPP Diesel only)

• MAHLE HS4961 Head Gasket Set (.010) for 89-98 4BT 3.9L
• MAHLE HS4961-2 Head Gasket Set (.020) for 89-98 4BT 3.9L

Notes

This gasket set services the lower end only (oil pan, front cover, rear main housing). For a full overhaul, pair with the appropriate head gasket kit such as the HS4961 series. Verify your engine serial number and bore/stroke configuration before purchase.

FAQ

Will this set cover the entire engine rebuild?

No — CS4961 covers the lower end (conversion bottom-end) of the 4.9L/4BT engine. You’ll need a separate head gasket set for the cylinder head and top end.

Does this fit a Dodge Ram factory 3.9L 4BT?

Factory U.S. Ram trucks didn’t ship with the 3.9L 4BT. CS4961 is for 3.9L 4BT industrial, commercial or swap applications between 1989-1998.

What OE number is replaced by this kit?

This kit replaces Cummins OE number 3802375 (earlier supersessions 3802019 & 3802266). 

Specifications for Mahle CS4961