Product Description
Cummins 3900267 OEM Tappet Cover Bolt Grommet Seal – 5.9L (1989-1998)
The Cummins 3900267 OEM Tappet Cover Bolt Grommet Seal is a genuine Cummins replacement sealing grommet designed for 1989-1998 5.9L 12-valve and early 24-valve Cummins diesel engines. This OEM rubber seal fits the tappet cover retaining bolts and helps prevent oil leaks by maintaining a proper seal between the tappet cover and engine block.
Over time, factory grommet seals can become brittle, crack, flatten, or deteriorate due to heat and age, leading to oil seepage around the tappet cover bolts. Replacing worn seals with genuine Cummins 3900267 grommets helps restore proper sealing performance and maintain a clean, leak-free engine compartment.
Features
- Genuine Cummins OEM replacement part
- Direct replacement for worn or damaged tappet cover bolt seals
- Helps prevent oil leaks around tappet cover retaining bolts
- Manufactured to original Cummins specifications
- Durable rubber construction for long service life
- Restores proper sealing performance
- Ideal for maintenance and engine resealing projects
- Designed specifically for Cummins B-Series diesel engines
Fitment
- 1989-1993 Dodge Ram 5.9L Cummins (12-Valve)
- 1994-1998 Dodge Ram 5.9L Cummins (12-Valve)
- 1998.5 Early 24-Valve Cummins Applications
- Industrial 5.9L Cummins B-Series Engines
- Marine 5.9L Cummins Applications
- Agricultural Equipment Equipped with Cummins B-Series Engines
Note: Always verify your engine serial number and application before ordering. Multiple seals may be required depending on the repair being performed.
What's Included
- One (1) Genuine Cummins 3900267 Tappet Cover Bolt Grommet Seal
Specifications
- Manufacturer: Cummins
- Part Number: 3900267
- Product Type: Tappet Cover Bolt Grommet Seal
- Material: Rubber Elastomer
- Installation Location: Tappet Cover Retaining Bolts
- Engine Platform: Cummins 5.9L B-Series
- Application: Oil Leak Prevention and Sealing
- OEM Replacement: Yes
- Condition: New Genuine Cummins Part
Cross Reference Numbers
3900267, Cummins 3900267, OEM Tappet Cover Grommet Seal, Cummins Tappet Cover Bolt Seal
FAQ
What does the Cummins 3900267 grommet seal do?
This seal fits around the tappet cover retaining bolts and helps prevent engine oil from leaking around the fasteners and tappet cover assembly.
Will this fit my 12-valve Cummins?
Yes. The 3900267 seal is commonly used on 1989-1998 5.9L 12-valve Cummins engines. Always verify your application before ordering.
Should all tappet cover seals be replaced at the same time?
Yes. When servicing the tappet cover, replacing all grommets at the same time helps ensure a complete seal and reduces the chance of future oil leaks.
Is this a genuine Cummins part?
Yes. The 3900267 is a genuine OEM Cummins replacement component manufactured to factory specifications.
Can a damaged grommet cause an oil leak?
Yes. Cracked, flattened, or hardened seals can allow oil to seep around the tappet cover bolts, creating leaks and engine grime buildup.
Is this sold individually or as a kit?
This part is typically sold individually. Check your engine configuration to determine the quantity required for your repair.
