Product Description
Interstate-McBee M-3284623 Push Rod (Tappet) Cover Gasket – 1989–2002 5.9L Cummins
Replacement gasket for the push rod (tappet) cover on 5.9L Cummins B-Series engines. Seals the lifter/tappet chamber to prevent oil seepage and maintain crankcase vacuum. Sold individually.
- OE-style fit: Form, fit, and function matched to the original Cummins spec.
- Durable sealing: Designed to resist heat, oil saturation, and clamp load cycles.
- Service friendly: Ideal for refreshes when addressing oil leaks at the tappet cover.
- Value: Interstate-McBee quality at a great price point.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3284623 |
| OEM Reference | Cummins 3284623 |
| Component | Push rod / tappet cover gasket |
| Sold As | Each (1 gasket) |
| Location | Engine left side (push rod / lifter chamber cover) |
What’s Included
- (1) Push rod (tappet) cover gasket, P/N M-3284623
Vehicle Fitment
Always verify by engine serial number (ESN) when possible.
- Dodge Ram 2500/3500 5.9L Cummins
- 12-Valve (6BT): 1989–1998
- 24-Valve (ISB): 1998.5–2002
- Other B-Series applications where Cummins 3284623 is specified.
Recommended/Related Parts
- Tappet cover hardware (bolts/screws) and isolators
- Crankcase breather / grommet (if equipped on the cover)
- Valve cover gasket set (if servicing top-end leaks concurrently)
- Solvent/degreaser and lint-free wipes for surface prep
Install Notes
- Clean mating surfaces thoroughly; remove old gasket material and oil residue.
- Dry-fit the gasket to confirm orientation; do not stretch.
- Use light, even torque on cover fasteners in a criss-cross pattern; follow factory specs.
- Avoid RTV unless specifically called for by the service manual.
Why Buy From CPP Diesel
- ESN-verified fitment support from diesel specialists
- Fast shipping and easy returns
- Extensive inventory of complementary B-Series service parts
FAQ
Is this the same as a “push rod cover gasket” or “lifter cover gasket”?
Yes. These terms all refer to the tappet chamber cover gasket on the side of the 5.9L Cummins block.
How many do I need?
One gasket per engine. This listing is for a single (1) gasket.
Will this fit both 12-valve and 24-valve 5.9L engines?
Yes—this listing covers 1989–2002 5.9L Cummins where Cummins ref. 3284623 is specified. Verify by ESN for best results.
