Cummins - Gasket - 3008400
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Cummins 3008400 Gasket is a replacement sealing gasket used on compatible Cummins engine assemblies where this part number is specified. It helps create a proper seal between mating surfaces, preventing leaks and maintaining correct system pressure or fluid containment depending on its installation location.
Key Features
- Replacement Cummins gasket
- Used where 3008400 is specified in the Cummins parts breakdown
- Helps seal mating engine or component surfaces
- Suitable for maintenance, rebuild, and repair work
- Recommended whenever the related component is removed
Engine Compatibility
For Cummins applications that call for gasket 3008400. Confirm fitment by engine model, component assembly, and original parts diagram before ordering.
Serial Number Fitment Notice
Cummins gaskets can vary by engine family, production configuration, and component location. Always verify by engine serial number or Cummins parts manual before installation.
When This Part Needs Replacement
Replace this gasket if the original is torn, compressed, brittle, oil-soaked, coolant-damaged, or leaking. It should also be replaced whenever the sealed component is removed for service.
Installation Notes
Clean both mating surfaces fully before installation. Remove old gasket material carefully, inspect for corrosion or surface damage, and tighten fasteners evenly to the correct service specification.
Alternate/Superseded Part Numbers
- 3008400
Parts Desk Insight
Small gaskets are often the difference between a clean repair and a repeat leak. Matching the exact Cummins part number and assembly location is the safest way to confirm fitment.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.