Interstate-McBee M-3906698 Water Pump O-Ring Seal — 1989–2018 5.9L/6.7L Cummins

OEM-style water pump mounting seal ring (O-ring) engineered by Interstate-McBee for Cummins B-Series 5.9L & 6.7L applications. Designed to seal between the water pump and the engine block for a leak-free install whenever the pump is serviced or replaced.

• Direct-fit, OEM-equivalent: Interchanges with Cummins 3906698.
• Purpose-built sealing: Rectangular ring profile for stable compression and long service life.
• Aftermarket value: Interstate-McBee quality at a lower cost than OEM-boxed parts.

Specifications

Vehicle Fitment

Always verify by engine serial number (ESN) for best accuracy.

• Dodge/Ram with 5.9L or 6.7L Cummins (1989–2018) — commonly used on 2500/3500, and many 4500/5500 (2008–2018).

Install Notes

• Clean mating surfaces on pump and block thoroughly; remove old seal material.
• Lubricate the O-ring lightly before install and align carefully to avoid pinching.
• Replace the seal any time the water pump is removed.

Warranty

New Interstate-McBee engine parts are covered by a manufacturer warranty (commonly up to 24 months from installation for new engine parts). See official policy or contact us for details.

Why Buy From CPP Diesel

• Diesel-specific fitment support for Cummins B-Series platforms
• Fast shipping and easy returns
• Knowledgeable techs who can check ESN-level compatibility

FAQ