Product Description
Interstate-McBee M-3937111 Front Crankshaft Seal – 1989–2007 5.9L Cummins (Aftermarket)
Replace a leaking front main seal on your 1989–2007 5.9L Cummins with the Interstate-McBee M-3937111. Built to OEM-equivalent specs for reliable sealing, factory-style fit, and long service life—ideal during timing cover/gear case service or whenever oil residue appears at the harmonic balancer.
- OEM-style fit: Direct replacement for Cummins reference 3937111.
- Durable materials: Quality elastomer and lip design for consistent sealing.
- Install-friendly: Works with common installer tools (see tool note below).
- Aftermarket value: Interstate-McBee quality at a budget-friendly price.
Specifications
Manufacturer | Interstate-McBee |
---|---|
Part Number | M-3937111 |
OEM Cross-Ref | 3937111 (Cummins) |
Position | Front Crankshaft (Front Main) Seal |
Recommended Installer Tool | Cummins 3824498 (or equivalent) |
Vehicle Fitment
Always verify by engine serial number (ESN) for edge cases and build dates.
- Dodge Ram 2500/3500 5.9L Cummins (ISB/6BT)
- 1989–1998 12-Valve 5.9L
- 1998.5–2002 24-Valve ISB 5.9L
- 2003–2007 ISB 5.9L (Common-Rail)
- Cummins 4931561 – Front crankshaft seal for 6.7L (2007.5–2018).
- Cummins 4890832 – Front seal kit for ISB/QSB 6.7L (select applications).
- Cummins 3802820 – Front seal + wear sleeve kit (covers many 1989–2018 applications; confirm by ESN).
Installation Notes
- Use a proper installer (e.g., 3824498) to avoid lip damage and ensure depth.
- Inspect crank hub surface; if grooved, install a wear sleeve kit (3802820).
- Clean mating surfaces thoroughly; follow Cummins service manual procedures and torque values.
What’s Included
- (1) Front crankshaft oil seal – M-3937111
Why Buy From CPP Diesel
- ESN-verified fitment support by diesel specialists
- Fast shipping & easy returns
- Curated B-series inventory with matching tools and kits