Interstate-McBee M-3959052 Oil Pan Gasket – 89–98 5.9L Cummins (Aftermarket)

Direct-fit oil pan gasket engineered to OEM dimensions for the 1989–1998 5.9L Cummins (6BT/12-valve) used in Dodge Ram 2500/3500. Built for dependable sealing during pan service or lower-end refresh, this Interstate-McBee aftermarket replacement offers OEM-style fit and durability at a better value.

• OEM-equivalent fit: Cross-references Cummins 3959052 and related numbers (see list below).
• Reliable seal: Purpose-built to maintain pan sealing integrity under heat and vibration.
• Aftermarket value: Quality replacement without OEM price inflation.
• Easy install: Designed for stock pan and factory fasteners.

Specifications

What’s Included

• (1) Oil pan gasket

Vehicle Fitment

Always verify by engine serial number (ESN) for edge cases.

• Dodge Ram 2500/3500 — 5.9L Cummins (6BT/12V): 1989–1998 primary fitment.
• Extended compatibility: Also widely listed for 1998.5–2002 5.9L Cummins 24-valve (ISB); confirm by ESN before ordering.
• Industrial/Off-Highway: Common across Cummins 4BT/6BT/ISB/QSB platforms; verify by model & ESN.

Install Notes

• Clean mating surfaces thoroughly; remove all old gasket/RTV.
• Follow Cummins service manual for torque specs and tightening sequence.
• Use small RTV dabs only where the service manual specifies (e.g., timing cover joints).
• Inspect pan rail for flatness; correct minor bends before install.

Warranty

Interstate-McBee new engine parts are typically warranted for 24 months from date of installation under normal use and service. See manufacturer policy for details.

Cross-Reference Summary

Cummins 3959052 (primary), plus 3901287, 3904577, 3906028, 3911536, 3931346, 3937072; Mopar 04429536, 05003694AA, 05003694AB.

Why Buy From CPP Diesel

• Diesel-specialist support with ESN verification.
• Curated B-Series parts for accurate fitment the first time.
• Fast shipping and hassle-free returns.

FAQ