CUMMINS 3914403 OEM ENGINE OIL PAN – 6BT 5.9L (1989–1993)

cummins 3914403 oil pan, 89-93 dodge cummins oil pan, 5.9l 6bt 12v oil pan, first gen dodge ram engine oil pan, mopar 4429403 cross reference, genuine cummins 6b5.9 oil pan, cpp diesel cummins genuine parts, tier 2 5.9 b series oil pan Keep your first-gen 5.9L 12-valve running clean and leak-free with the CUMMINS 3914403 OEM ENGINE OIL PAN. This is a brand-new, genuine Cummins stamped-steel pan, not a knockoff or universal replacement. It restores factory sump capacity, maintains proper oil control for your 6BT, and features the OE M18 x 1.5 drain port for hassle-free service.

Engineered for Tier 2 5.9L B-series applications, this pan matches the original contours and bolt pattern used on 1989–1993 Dodge/Ram trucks and many 6B5.9 industrial engines. If your factory pan is rusted, dented, or has stripped drain threads, Cummins 3914403 is the correct way to get back to OE reliability and sealing performance.

Fitment – 6BT 5.9L (1989–1993 & B-Series)

• Truck applications: 1989–1993 Dodge/Ram 250/350 & 2500/3500 with 5.9L 12-valve (6BT) diesel.
• Engine families: 6B5.9 / B5.9 diesel and related Tier 2 B-series industrial engines (verify by ESN).

Important: This pan is specific to the early 6BT layout used on 1989–1993 trucks. Later 5.9L and 6.7L Cummins applications use different pans and pickup arrangements. Always confirm by model year and engine serial number before ordering.

Key Features & Benefits

• Genuine Cummins 3914403 oil pan – direct OE replacement.
• Stamped-steel construction for durability and proper heat shedding.
• Factory drain port with M18 x 1.5 thread (drain plug sold separately).
• Correct sump shape and depth for 5.9L 6BT oil pickup geometry.
• Corrosion-resistant coating to help fight rust in harsh climates.

Cross-Reference & Related Cummins Parts

For a complete, leak-free oil system refresh on your 5.9L Cummins, pair this pan with the following Cummins genuine components available at CPP Diesel:

• CUMMINS 3938157 OEM OIL PICKUP TUBE FLANGE GASKET – 6BT/ISB 5.9L (1989–2002)
• CUMMINS 3923096 OEM SEALING WASHER – OIL PAN DRAIN PLUG (5.9L CUMMINS 1994–2002)
• CUMMINS 4939587 OEM ENGINE OIL PUMP – 5.9L 12V/24V (1989–2002) | 4BT/6BT
• CUMMINS 4089093 OEM ENGINE OIL PAN – 5.9L (1994–2002)  (later-model pan, shown for comparison – not a direct swap for ’89–’93).
• CUMMINS 3928455 OEM ENGINE OIL PICKUP TUBE – 5.9L (1994–2002)  (use when upgrading to the 1994–2002 oil pan kit).

OE cross-reference (ID only, not linked): Mopar 4429403 and Cummins 3911505 are commonly listed as related identifiers for this pan.

What’s Included

• (1) Genuine Cummins engine oil pan – part number 3914403.

Gasket, drain plug, sealing washer, and mounting hardware are not included and should be purchased separately.

Installation Notes

• Support the engine and remove any skid plates or crossmembers as required.
• Thoroughly clean the block rail and remove old gasket material or RTV.
• Use a correct, quality oil pan gasket and torque bolts in sequence to OE specs.
• Install a new drain plug and sealing washer to prevent future leaks.
• Refill with fresh oil, start the engine, and inspect for leaks at idle and after a test drive.

FAQ

Yes. Cummins 3914403 is the correct OE-style pan for most 1989–1993 Dodge/Ram 250/350 and 2500/3500 trucks equipped with the 5.9L 12-valve (6BT) engine. If you are unsure, verify compatibility using your engine serial number (ESN) before ordering.

No. This listing is for the oil pan only. You will need to purchase the oil pan gasket and drain plug separately. We recommend pairing it with a quality pan gasket and a new M18 x 1.5 drain plug and sealing washer for best results.

The drain port on Cummins 3914403 uses an M18 x 1.5 thread. Always use the correct-size plug and a fresh sealing washer to prevent leaks and avoid damaging the threads.

Later 5.9L Cummins engines (1994–2002) use different pan and pickup tube designs. While the 4089093 pan is similar in function, the shape, bolt pattern details, and pickup arrangement are different. For best fitment and oil control, always match the pan to your specific model year range.

Yes. Like many metal automotive components, this product may expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov .

Specifications for cummins 3914403