Question about freeze plugs - Team Camaro Tech
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post #1 of 7 (permalink) Old Mar 24th, 03, 01:55 AM Thread Starter
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I'm not a full fledged mechanic, so forgive me if I seem stupid, but what are freeze plugs and what are they used for.

When you buy an American car, you provide work for a man and his family for three months. -Jay Leno
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post #2 of 7 (permalink) Old Mar 24th, 03, 02:19 AM
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They are really core plugs used to clean the sand out of the block after it is cast.

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post #3 of 7 (permalink) Old Mar 24th, 03, 03:19 AM
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The theory is that if you were to actually freeze the water in the engine block, then the core/freeze plug would be pushed out by the expanding ice and save the engine block from cracking.

The reality is that antifreeze works much better, and a freeze plug rarely saves an engine that is carelessly stored for the winter. (maybe about 1 in 5!)
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post #4 of 7 (permalink) Old Mar 24th, 03, 03:40 AM Thread Starter
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Makes sense! Thanks [img]smile.gif[/img]

When you buy an American car, you provide work for a man and his family for three months. -Jay Leno
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post #5 of 7 (permalink) Old Mar 24th, 03, 06:57 PM
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I have to agree with 67 plum, that's how I understood it also.

Rick

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post #6 of 7 (permalink) Old Mar 24th, 03, 08:03 PM
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Ditto on the casting sand. It's interesting how technical necessity can turn into a feature.

-dnult

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post #7 of 7 (permalink) Old Mar 25th, 03, 08:44 AM
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RSS and Dnult,

I understand that the plugs are there as a casting necessity, but up here where I live, sometimes it's pretty obvious why they earned the name "freeze plug"!!
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