Product Description
Interstate-McBee M-4090035 Upper Gasket Set — 1998.5–2002 5.9L Cummins 24-Valve (Aftermarket Replacement)
Complete upper (top-end) gasket set for the 1998.5–2002 Dodge Ram 2500/3500 with the 5.9L Cummins 24-valve ISB. Built to OE form, fit, and function to refresh the cylinder head and related systems.
- Purpose-built: Covers the gaskets and seals you need for common top-end service.
- OE-equivalent fit: Matches Cummins reference 4090035 for ISB 24-valve applications.
- Reliable materials: Quality sealing surfaces for factory-like durability.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-4090035 |
| OEM Reference | Cummins 4090035 |
| Engine | 5.9L Cummins ISB, 24-valve |
| Model Years | 1998.5–2002 |
| Sold As | Kit (upper gasket set) |
What’s Included (Typical)
Exact contents can vary by batch; verify against your engine serial number (ESN) if you have specific needs.
- Cylinder head gasket
- Valve cover gasket(s)
- Intake and exhaust manifold gaskets
- EGR/charge-air and throttle body gaskets or O-rings (as applicable)
- Injector and crossover tube sealing washers/O-rings
- Thermostat housing and water outlet gaskets
- Misc. top-end seals and O-rings
Vehicle Fitment
Always confirm by ESN for the most accurate fitment.
- Dodge Ram 2500/3500 with 5.9L Cummins ISB 24-valve
- Years: 1998.5, 1999, 2000, 2001, 2002
Recommended/Related Parts
- New head bolts or head studs (recommended whenever the head is removed)
- Coolant, engine oil, and filter for post-repair service
- Intake/exhaust hardware (studs, nuts) if corroded or damaged
- Injector sealing kits if injectors are serviced
Install Notes
- Follow the factory torque sequence and values for the 24-valve ISB.
- Check head and block surfaces for flatness and cleanliness.
- Replace single-use fasteners as required; lubricate threads where specified.
- Re-torque procedures vary by hardware (bolts vs. studs); follow the instructions supplied with your hardware.
Why Buy From CPP Diesel
- ESN-verified fitment help from diesel specialists
- Fast shipping and easy returns
- Wide selection of complementary Cummins ISB service parts
FAQ
Is this the correct set for my 24-valve 5.9L?
Yes—this kit targets the 1998.5–2002 5.9L Cummins ISB 24-valve found in Ram 2500/3500. For edge cases, verify by ESN.
Does this include lower-end gaskets?
No—this is an upper (top-end) gasket set. Oil pan, rear/main seals, and other lower-end items are not included.
Should I replace head bolts?
It’s highly recommended to install new head bolts or upgrade to studs when the head is removed.
