Product Description
Keep your 24-valve 5.9L Cummins sealed and reliable with the CUMMINS 4090035 OEM UPPER ENGINE GASKET KIT, the same standard-thickness kit used by Cummins certified repair facilities. This complete genuine kit includes the correct OE gaskets, seals, and O-rings required when servicing the cylinder head or performing top-end maintenance on 1998.5–2002 ISB engines. Unlike aftermarket kits with inconsistent sealing materials, the Cummins 4090035 kit ensures factory-calibrated sealing for long-term durability, clean combustion, and leak-free operation.
Whether you're repairing a blown head gasket, installing injectors, or rebuilding the top end, this genuine Cummins 4090035 gasket set is engineered for perfect fitment, OE torque retention, and long-lasting performance. Trust only factory Cummins components for your 24-valve ISB.
Included Components
- Cylinder head gasket (standard thickness)
- Valve cover gasket
- Intake and exhaust manifold gaskets
- Injector O-rings and seals
- Thermostat housing gasket
- Rocker box/upper valve cover seals
- Misc. O-rings, sealing washers, and coolant seals
Fitment
This Cummins upper gasket kit fits the following vehicles:
- 1998.5–2002 Dodge Ram 2500 5.9L 24-valve Cummins (ISB)
- 1998.5–2002 Dodge Ram 3500 5.9L 24-valve Cummins (ISB)
Engine: 5.9L ISB 24-valve (VP44-equipped engines).
Thickness: Standard thickness (non-over/under-sized).
Always verify by engine serial number (ESN) before ordering.
Cross-Reference (Identification Only)
- Cummins: 4090035 (this kit)
- Cummins supersession: 4089399
- Mopar reference: 5018598AA
Cross-reference numbers are for identification only. Use Cummins ESN to confirm fitment.
Related Genuine Cummins Parts (Working CPP Links)
- CUMMINS 3937111 FRONT CRANKSHAFT SEAL SERVICE KIT – 5.9L CUMMINS (1989–2007)
- CUMMINS 3804899 OEM FRONT CRANKSHAFT SEAL – 5.9L/6.7L CUMMINS (2003–2018)
- CUMMINS 3920706 OEM EXPANSION PLUG – TURBO DRAIN – 5.9L/6.7L CUMMINS (1989–2018)
Installation Notes
- Thoroughly clean all sealing surfaces before installation.
- Always use Cummins torque specifications for head bolts and rocker assemblies.
- Check injector bore sealing surfaces for erosion before reassembly.
- Do not mix aftermarket gaskets with OE components when rebuilding a Cummins ISB.
Specifications for cummins 4090035
| Specification | Detail |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Part Number | 4090035 |
| Engine Compatibility | 1998.5–2002 5.9L ISB Cummins (24-valve) |
| Kit Type | Upper Engine Gasket Kit (Standard Thickness) |
| UPC | Not published by Cummins |
| GTIN | Not published by Cummins |
| Shipping Weight | Approx. 3–4 lbs |
| Shipping Dimensions | Flat gasket pack, approx. 26 × 12 × 3 in |
| Shipping Method | Standard ground, oversized flat packaging |
| Cross Reference | Cummins 4089399, Mopar 5018598AA |
| E-Codes | Not specified – OE emissions-compliant |
| Prop 65 Warning | This product may expose you to chemicals known to the State of California to cause cancer or reproductive harm. www.P65Warnings.ca.gov |
FAQ
IS THIS A GENUINE CUMMINS 4090035 GASKET KIT?
Yes. This is a genuine Cummins OEM upper engine gasket kit, not an aftermarket reproduction. It includes OE materials and correct Cummins sealing components.
DOES THIS KIT INCLUDE THE STANDARD-THICKNESS HEAD GASKET?
Yes. The Cummins 4090035 kit includes the correct standard-thickness head gasket for 1998.5–2002 24-valve ISB engines.
WILL THIS FIT MY 1998 12-VALVE?
No. This kit fits 1998.5–2002 24-valve engines only. For 12-valve engines, use the proper Cummins 12V gasket set.
WHAT ELSE SHOULD I REPLACE WHEN DOING A CYLINDER HEAD JOB?
Many owners also replace the front crankshaft seal (3937111), front main seal (3804899), and other critical OE seals to prevent leaks after reassembly.
