MAHLE OS32172 ENGINE OIL PAN GASKET FOR 89-98 CUMMINS 4BT

Product Description

Stop leaks and keep your 3.9L Cummins 4BT clean with the MAHLE OS32172 engine oil pan gasket. Built to OE form, fit, and function, this direct-fit replacement restores a reliable seal at the pan rails for long service life in work trucks, industrial 4B/4BT swaps, and daily drivers.

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Fitment

• 1989–1998 Cummins 3.9L 4BT (B-Series / 4B, common step-van & industrial applications)

Cross-Reference / Related Mahle Items on CPP Diesel

• MAHLE CS4961 Lower (Conversion) Gasket Set – 1989–1998 3.9L 4BT
• MAHLE HS4961 Head Gasket Set – Standard Thickness – 3.9L 4BT
• MAHLE HS4961-2 Head Gasket Set (+.010) – 3.9L 4BT
• MAHLE HS4961-3 Head Gasket Set (+.020) – 3.9L 4BT
• MAHLE OS32139 Engine Oil Pan Gasket – 1989–2002 Cummins 5.9L (related)

Notes

Clean both sealing surfaces thoroughly and check pan flange straightness. Follow Cummins torque specs and pattern; apply RTV at corners where service manual specifies.

FAQ

Will OS32172 fit my 4BT?

Yes—OS32172 is listed for 1989–1998 Cummins 3.9L 4BT (B-Series/4B) applications. Verify your pan style before ordering.

What’s included?

One OE-style oil pan gasket. Reuse factory hardware unless inspection indicates replacement.

Do I need sealant?

Use a small amount of RTV at timing cover and rear cap corners if specified by Cummins; otherwise install the gasket dry on clean, oil-free surfaces.

Specifications for Mahle OS32172