6066 (1960-1966) GMC Truck Club - Freeze Plug Diameter

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- - Freeze Plug Diameter (https://6066gmcclub.com/showthread.php?t=51287)

1972RedNeck

February 3rd, 2022 08:55 PM

Freeze Plug Diameter

What's the diameter of the freeze plugs on these engines? I find some listed for 1.75" and some 1.735"...

sclor

February 5th, 2022 09:49 PM

Re: Freeze Plug Diameter

I looked up on rockauto.com. I think the 1.75" is correct. I saw 1.75" as the minimum and 1.7635 as the maximum. Looks like they are a bit cone shaped so they tighten as they go in.

Hope that helps.
Regards
Steve
New Orleans

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