Product Description
Interstate-McBee M-3928759 Tappet Cover Grommet Seal — 98.5–02 5.9L Cummins (24-Valve)
Direct-fit grommet seal for the tappet cover (crankcase breather opening) on 1998.5–2002 Dodge Ram 2500/3500 with the 5.9L Cummins 24-valve ISB. Restores a tight seal to reduce oil seepage and fumes. Sold individually.
- OE-style replacement: Matches the form, fit, and function of the original grommet.
- Stops leaks: Fresh elastomer helps prevent oil mist and dust ingress at the breather/tappet cover.
- Durable materials: Interstate-McBee quality for long service life.
- Easy install: Press-in design for quick service during tappet cover or breather maintenance.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3928759 |
| OEM Reference | Cummins 3928759 |
| Application | Tappet cover / crankcase breather grommet |
| Sold As | Each (1 grommet) |
What’s Included
- (1) Tappet cover grommet seal, P/N M-3928759
Vehicle Fitment
Always verify by engine serial number (ESN) when possible.
- Dodge Ram 2500/3500 5.9L Cummins ISB (24-valve, VP44)
- Model Years: 1998.5–2002
- Other B-Series applications where Cummins 3928759 is specified (confirm by ESN).
Recommended/Related Parts
- Tappet cover gasket (replace whenever the cover is removed)
- Crankcase breather element / filter
- Breather tube & clamp(s)
- Solvent/degreaser and lint-free wipes for surface prep
Install Notes
- Work on a cool engine. Clean the tappet cover bore thoroughly; remove old rubber and residue.
- Lightly lubricate the new grommet with engine oil to ease installation; press evenly into place.
- Inspect breather tube and element; replace if brittle, cracked, or oil-logged.
- If the tappet cover is removed, replace the cover gasket and torque fasteners to spec per the Cummins service manual.
Why Buy From CPP Diesel
- ESN-verified fitment support from diesel specialists
- Fast shipping, easy returns, competitive pricing
- Deep inventory of Cummins B-Series maintenance parts
FAQ
Will this fit my 1999 or 2001 5.9L Cummins?
Yes—this grommet is for the 24-valve ISB used in 1998.5–2002 Dodge Ram 2500/3500. For edge cases, verify by ESN.
Does this fix oil leaks around the breather?
Replacing a hardened or cracked grommet usually stops seepage at the breather opening. Also check the breather element and tube.
How many do I need?
One grommet per engine. Sold individually.
