Product Description
The CUMMINS 3937111 OEM FRONT CRANKSHAFT SEAL SERVICE KIT is designed for 1989–2007 5.9L Cummins diesel engines. This genuine Cummins service kit is engineered to repair front crankshaft seal leaks while restoring proper sealing performance, reliability, and OEM fitment.
Use this kit when replacing a leaking front crankshaft seal, performing front engine service, timing cover repairs, or during engine rebuild work. Proper seal replacement helps prevent oil leaks, contamination, and premature engine component wear. Always verify fitment by engine serial number before ordering.
FEATURES
- Genuine Cummins OEM front crankshaft seal service kit
- Designed for 1989–2007 5.9L Cummins applications
- Helps repair front crankshaft oil leaks
- Direct-fit replacement components for OEM sealing performance
- Ideal for maintenance, repair, or engine rebuild projects
- Built to Cummins factory specifications
FITMENT
- 1989–1998 Dodge Ram 2500/3500 5.9L Cummins 12-Valve
- 1998.5–2002 Dodge Ram 2500/3500 5.9L Cummins 24-Valve
- 2003–2007 Dodge Ram 2500/3500 5.9L Cummins Common Rail
- Select Cummins industrial and commercial 5.9L engine applications
WHAT'S INCLUDED
- 1 Cummins 3937111 OEM Front Crankshaft Seal Service Kit
- Front crankshaft seal and associated service components supplied by Cummins
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3937111
- Cummins Front Timing Cover Components
- Cummins Harmonic Balancer Components
- Cummins Front Engine Gasket and Seal Components
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3937111
- Part Type: Front Crankshaft Seal Service Kit
- Engine Compatibility: 5.9L Cummins
- Fitment Years: 1989–2007
- Vehicle Application: Dodge Ram 2500 / 3500
- Condition: New OEM Cummins
- Installation Location: Front Crankshaft Seal Area
- Seal Type: Front Main / Crankshaft Oil Seal
FAQ
Will this seal kit fit my truck?
This service kit fits many 1989–2007 5.9L Cummins applications. Always verify fitment using your engine serial number before ordering.
What does this kit repair?
This kit is designed to repair leaks at the front crankshaft seal area and restore proper oil sealing performance.
Is this a genuine Cummins part?
Yes. Cummins 3937111 is a genuine OEM Cummins front crankshaft seal service kit.
What are the signs of a failing front crankshaft seal?
Common symptoms include oil leakage around the harmonic balancer, oil accumulation on the front engine cover, and visible oil dripping near the crankshaft pulley area.
Should the harmonic balancer be inspected during installation?
Yes. Inspect the harmonic balancer, wear sleeve surfaces, front cover area, and related sealing components during service.
Do I need any related parts?
Inspect the harmonic balancer, front cover gasket, wear sleeve, accessory drive components, and related seals during installation and replace worn parts as necessary.
