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Your cart is empty.Mr. Gasket Replacement O-Rings fit perfectly and form a dependable, leak-proof seal. Fully compatible with four different water necks (Mr. Gasket part numbers 2660, 2661, 2667, and 9845), they're made of rubber, designed specifically for big-block and small-block Chevys, take minutes to install, and ensure years of trouble-free service.
SDJ50504
Reviewed in the United States on February 28, 2024
Exactly what I needed to get a proper seal on my thermostat housing. Put the second on my brothers vehicle and sealed that as well.Would buy again.
John B.
Reviewed in the United States on September 11, 2022
nice
Dale G.
Reviewed in the United States on June 28, 2021
Works great
Fastnuf
Reviewed in the United States on September 19, 2019
This O-ring fit my Trans Dapt/Mr. Gasket water neck perfectly and I was able to reuse it twice. (Third time was NOT a charm.
wayne l.
Reviewed in the United States on July 4, 2019
Worked well.
Big D
Reviewed in the United States on July 4, 2017
I've been using this system for a couple of years now and it is the cleanest way to seal the thermostat housing that I have. You DO need to have the correct housing, with the channel for the O ring in it. I was under the impression that they were reusable, as the product packaging for the thermostat housing may have suggested, but the O ring will not seal if you attempt to reuse it- which is exactly the reason I bought these replacements, AND the reason it isn't getting 5 stars. No messy RTV, no crossing fingers that both surfaces are completely flat. No scraping RTV or gasket material off of the intake or housing when you replace. Just pull out the old O ring and press in the new one.
rcflyerjr
Reviewed in the United States on November 19, 2014
junk
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