✓ VERIFIED
Jan 16, 2020
Almost identical to OEM. Good fit. I did miss that they are sold as each and not as a pair. Small detail and my fault but it did slow my project down a bit.
COMETIC
SKU: 68-10305
Cometic Milwaukee-Eight Oil Pump Seal Viton 1-Pack - Engine Case
$25.000,00
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About Cometic
Cometic Gasket manufactures multi-layer steel head gaskets and complete gasket kits in Concord, Ohio. On a built V-twin running higher compression or a big-bore kit, the MLS head gasket is what keeps the top end sealed — which is why Cometic is the default spec on so many engine builds.
Keep your Milwaukee-Eight engine sealed tight where it matters most with this Cometic M8 oil pump seal. Crafted from durable Viton material, this single seal is engineered to create a reliable, leak-free connection between the oil pump and the engine case.
Why riders pick this
- Viton material for superior heat/oil resistance
- Seals oil pump to engine case on M8
- Ensures a reliable, leak-free connection
- Designed for Milwaukee-Eight engines
The oil pump-to-engine case interface is a critical sealing point on any Milwaukee-Eight, and a compromised seal can lead to significant issues. This Cometic oil pump seal, made from high-grade Viton, offers superior resistance to heat and oil degradation compared to standard materials. It's designed for a precise fit, ensuring long-term reliability and preventing oil leaks from this vital area of your V-twin engine.
Durable Sealing for Your Oil System
- Constructed from Viton for excellent heat and oil resistance
- Designed for the Milwaukee-Eight oil pump-to-engine case interface
- Ensures a reliable, leak-free connection
- Single seal pack for direct replacement
Protect Your M8's Oil Pressure
Proper oil pressure and a leak-free oil system are paramount for the health and longevity of your Milwaukee-Eight engine. Replacing the oil pump seal during maintenance or rebuilds is a crucial step to prevent future problems. This Cometic Viton seal is a smart investment for any M8 owner looking for dependable performance and peace of mind.
Specifications
- Brand: Cometic
- Manufacturer Part #: C10305
- Material: Viton
- Length: 9 in
- Width: 7 in
- Height: 2 in
- Weight: 1 lbs
Common questions
Will this oil pump seal fit Twin Cam engines?
No, this Cometic oil pump seal is specifically designed for Milwaukee-Eight (M8) engines. Twin Cam engines utilize a different seal for this application.
What material is this seal made from?
This oil pump seal is made from Viton, a high-performance material known for its excellent resistance to heat, chemicals, and oil degradation, ensuring long-lasting reliability.
Are special tools required to install this seal?
Installation of this seal typically requires the removal of the oil pump from the engine case. A service manual for your specific Milwaukee-Eight model and basic hand tools are recommended.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Cometic |
| TYPE | Gaskets/Seals |
| SKU | 68-10305 |
| WEIGHT | 1.0 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.87
15 RATINGS
5★
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✓ VERIFIED
Oct 18, 2021
Great seals and gaskets do the job once when you use quality gaskets
✓ VERIFIED
Sep 26, 2019
Seal good and I haven't had any issues..
✓ VERIFIED
Jun 27, 2025
It worked like it was suppose to, delivery was quick. <br />Pleased.
✓ VERIFIED
Dec 19, 2023
Just what I needed
Needed these when changing out intake manifold. They worked perfect for my ‘03 sporty.
✓ VERIFIED
Jun 12, 2023
Cometic from here on out
These seals are the only ones I'll use. others came close but, for me, these are best.
