Product Description
Genuine Cummins
Cummins 3977913 — Engine Oil Cooler Gasket Set
MPN: 3977913 | Also Known As: lubricating oil cooler gasket set, oil cooler seal kit | Cross-Refs (ID): 4941063, 4941062, PAI 131737
Why This Part
- ✓ OE sealing kit for the oil cooler interfaces to stop leaks and cross-contamination.
- ✓ Direct-fit for 2003–2007 5.9L and 2007.5–2023 6.7L Ram ISB (verify by VIN/ESN).
- ✓ Complete set with the primary gaskets needed for oil cooler service.
- ✓ Genuine Cummins materials withstand heat, pressure, and oil chemistry.
OE Fit Leak Prevention 1 Kit/Service
Quick Specs
| Type | Engine oil cooler gasket set |
|---|---|
| OE Part # | 3977913 |
| Applications | Ram 5.9L ISB (’03–’07), Ram 6.7L ISB (’07.5–’23) |
| Qty Required | 1 set per service (sold as a kit) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2003–2007 | Ram 5.9L ISB (24V Common-Rail) | Ram 2500/3500 |
| 2007.5–2023 | Ram 6.7L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Also used on select ISB/QSB applications—always confirm by ESN.
Often Paired With
- Oil Cooler Core: 3959031 (5.9L), 3975818 (6.7L)
- Oil Filter Housing / Head: 5289557
- Fresh oil & filter: change after cooler service, and again if contamination was present
What’s In The Box
- (1) Genuine Cummins Engine Oil Cooler Gasket Set (3977913)
- Hardware sold separately (if required by application)
Install Tips
- Drain oil (and coolant if applicable). Clean mating surfaces thoroughly.
- Use new gaskets from this kit; do not reuse old seals.
- Torque fasteners to factory spec; verify no leaks on warm-up.
FAQ
WILL THIS FIT MY 2003–2023 RAM 5.9L/6.7L?Yes—this OE gasket set covers 2003–2007 5.9L and 2007.5–2023 6.7L Ram ISB applications. Always verify by VIN/ESN.
WHAT’S INCLUDED IN THIS GASKET SET?The primary gaskets needed to service the oil cooler interfaces. Hardware is not included unless noted.
CAN THESE GASKETS BE REUSED?No—single-use. Always install fresh gaskets to ensure a reliable seal.
WHICH OIL COOLER DOES THIS PAIR WITH?Use 3959031 for 5.9L (’03–’07) and 3975818 for 6.7L (’07.5+). Replace gaskets whenever the cooler is serviced.
IS THIS A GENUINE CUMMINS KIT?Yes—OE Cummins 3977913 for proper fit, sealing, and durability.
Product Videos
Custom Field
Vehicle Year 2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022,2023
Vehicle Make DODGE
ENGINE 6.7L
Part Type Oil Cooler Gasket Set
