★★★★★ 5
Works as it should
Works as it should
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026
BD Diesel 14-18 GM 6L80 Cooler Bypass Kit
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
BD Diesel 14-18 GM 6L80 Cooler Bypass KitSKU: 1061530 COOLER BYPASS DELETE GM 6L80 2014 2018 FEATURES Eliminates factory bypass valve Ensures 100% fluid flow through the transmission cooler Keeps your transmission temperature as low as possible Includes all new seals required for install, and magnetic service plug ABOUT THIS PRODUCT Debris in the stock cooler bypass valve can cause it to jam the internal valve keeping it in recirculation mode. When this happens the transmission temperature
Quick Dispatch:
Your BD Diesel 14-18 GM 6L80 Cooler Bypass Kit orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.2 ★★★★★
Based on 555 reviews
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Product Reviews
★★★★★ 4
Four Stars
Just what I needed
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 14, 2016
★★★★★ 5
Functioned as advertized.
Installed these in my Whalers 96 200 Offshore. No issues, used permatex gasket compound on aluminum engine parts after cleaning with fine brass wire wheel.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 20, 2024
★★★★★ 5
Fits 1988 Sea Ray V-135 2 stroke (Mercury)
For those of you with the 135 hp
mercury that was branded as the "Sea Ray 135" and paint matched to the boat (i.e. Seville's and some others) this is the 147 degree thermostat for that motor. My Seville is an '88 and It's difficult to cross reference the serial numbers on those motors when searching for parts. Only buy Quicksilver parts for these motors. Happy to find them on Amazon because Boats.net as an example, is not clear on what you're getting.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 3, 2024
★★★★★ 5
fixed issue
stopped the overheat issue on my outboard!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 6, 2025
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