Product Description
Genuine Cummins
Cummins 4089173 — Lower Engine Gasket Kit (ISB 5.9L)
MPN: 4089173 | Also Known As: lower end gasket set, conversion gasket set | Complements: Upper kit 4089819 (sold separately)
Why This Part
- ✓ OE gasket coverage for the lower end (from oil pan up through gear housing interfaces).
- ✓ Direct-fit for 2003–2007 Ram 5.9L ISB (common-rail).
- ✓ Leak prevention with correct materials/geometry for diesel temps and pressures.
- ✓ Great for refresh/reseal or rebuild projects.
OE Fit Lower-End Kit 5.9L 2003–2007
Quick Specs
| Type | Lower engine gasket kit (conversion set) |
|---|---|
| OE Part # | 4089173 |
| Covers | Oil pan, cooler/core gaskets, gear housing interfaces, select O-rings & washers (contents vary by ESN) |
| Qty Required | 1 per engine (sold as a kit) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2003–2007 | Ram 5.9L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Common on Stage 3B ISB/QSB 5.9 applications—always verify by ESN.
Often Paired With
- Upper Engine Gasket Kit: Cummins 4089819 (’03–’07 5.9L)
- Front Crankshaft Seal (with wear sleeve): 3802820
- Rear Main Seal: 5405392 · Rear Main w/ Repair Sleeve: 3926126
- Oil Cooler Gaskets (5.9L ’03–’07): 3864458 (cooler→filter), 4895742 (cooler→block)
What’s In The Box
- (1) Genuine Cummins Lower Engine Gasket Kit (4089173)
- Front/rear crankshaft seals typically not included—order separately as needed.
Install Tips
- Clean all mating surfaces thoroughly; avoid abrasives that gouge aluminum.
- Dry-fit complex areas (gear housing, filter head/cooler) before final torque.
- Use proper sealant where the service manual calls for it; torque to spec and recheck after heat cycle.
FAQ
WILL THIS FIT MY 2003–2007 5.9L CUMMINS RAM?Yes—4089173 targets 2003–2007 5.9L ISB common-rail Rams (verify by VIN/ESN).
DOES THIS KIT INCLUDE FRONT/REAR CRANKSHAFT SEALS?Usually no—order front (3802820) and rear main (5405392 or 3926126 with sleeve) separately.
IS THIS A GENUINE CUMMINS KIT?Yes—OE Cummins 4089173 with the correct gasket materials for diesel service.
WHAT UPPER GASKET KIT MATCHES THIS?Use Cummins 4089819 (upper engine kit) to complete a full reseal on 2003–2007 5.9L engines.
WILL THIS WORK ON 6.7L TRUCKS?This listing is for 5.9L (’03–’07) Rams. Industrial 6.7L variants may use different kits—confirm by ESN.
Product Videos
Custom Field
Vehicle Year 2003,2004,2005,2006,2007
Vehicle Make DODGE RAM
ENGINE 5.9L
Part Type GASKET SET
