Product Description
Interstate-McBee M-3800487 Lower Engine Gasket Set – 1998.5–2002 5.9L Cummins 24-Valve (ISB)
Complete lower-end gasket and seal kit for the 5.9L Cummins 24-valve (ISB) used in 1998.5–2002 Dodge Ram 2500/3500. Designed as an OE-equivalent replacement to restore leak-free performance during bottom-end service.
- OE-style fit: Matches the factory form and function for reliable sealing.
- Comprehensive kit: Includes the common bottom-end gaskets and seals for one engine refresh.
- Quality materials: Interstate-McBee components built for durability and proper torque retention.
- Great value: Aftermarket replacement that meets or exceeds OEM performance at a smarter price.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3800487 |
| OEM Reference | Cummins 3800487 |
| Engine | 5.9L Cummins ISB (24-valve) |
| Model Years | 1998.5–2002 |
| Sold As | Set (lower engine gasket & seal kit) |
What’s Included
Typical contents (may vary by production run; always compare to product image and your ESN):
- Oil pan gasket or RTV seal set
- Front cover / timing cover gaskets
- Front crankshaft seal
- Rear main seal and housing/retainer gasket(s)
- Water pump O-ring and miscellaneous bottom-end O-rings
- Assorted seals and gaskets required for lower-end service
Vehicle Fitment
Verify by Engine Serial Number (ESN) whenever possible, especially around the 1998–1999 split.
- Dodge Ram 2500/3500 with 5.9L Cummins ISB 24-valve
- Model Years: 1998.5–2002 (mid-1998 “.5” changeover)
- Other B-Series ISB applications where Cummins 3800487 is specified (confirm by ESN).
Install Notes
- Thoroughly clean all sealing surfaces; remove old RTV and debris.
- Follow Cummins torque specs and sequence; observe seal orientation and installation depth.
- Use appropriate sealants only where the service manual specifies.
- Prime the rear main seal lip with clean engine oil before installation.
Frequently Asked Questions
Does this include a head gasket?
No—this is a lower engine set. The head gasket and intake/exhaust gaskets are part of the upper/overhaul sets.
Will this fit my 1998 truck?
Only if it’s a 1998.5 24-valve ISB. Early-1998 12-valve trucks use different gaskets. Verify by ESN to be sure.
Are front and rear main seals included?
Typically yes, but contents can vary by kit revision. Compare the listing’s contents/image and verify by ESN.
Why Buy From CPP Diesel
- Knowledgeable ESN-based fitment support
- Fast shipping and easy returns
- Extensive inventory for 5.9L Cummins service
