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GMC V6 and V12 Engines Engine repair and rebuilding

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Old February 3rd, 2022, 08:55 PM
1972RedNeck 1972RedNeck is offline
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Default 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"...
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Old February 5th, 2022, 09:49 PM
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sclor sclor is offline
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Default 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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