[AT] 430V Freeze plug

[szabelski at wildblue.net]

“Freeze Plugs” because when the block freezes enough, sufficient pressure builds up to push them out, and maybe some of the ice will stick out of the hole. However, if the water froze enough to push the plug out, it’s already frozen in the entire block, and the ice is not going to flow out of hole and relieve any pressure. The ice will actually reseal the hole.

Even if the plug is pushed out, the ice can continue to expand in other areas of the block enough to cause a crack.


Whether a crack occurs, or not, depends on the amount of antifreeze in the mixture and the outside temperature. None will probably cause a crack if it gets cold enough. Not enough will probably just result in the block being filled with a slushy mixture if it gets cold enough.


Carl

----- Original Message -----
From: Thomas Martin <tmartin at xtra.co.nz>
To: Antique Tractor Email Discussion Group <at at lists.antique-tractor.com>
Sent: Sun, 02 Feb 2020 15:30:40 -0500 (EST)
Subject: Re: [AT] 430V Freeze plug

Why do people persist in calling them freeze plugs?
The proper nomenclature is core plugs. Why? Because they close the apertures
in the cast block, which enable the cores to be removed, after casting.
That's why wet sleeve engine blocks have none.

Tom


> On 03 February 2020 at 07:46 James Peck <jamesgpeck at hotmail.com> wrote:
> 
> 
> Last weeping freeze plug I had was on the firewall side of a transverse engine. Those antique tractors do not hide the freeze plugs as much. 
> 
> Spencer Yost AT List Owner (spencer at rdfarms.com); <snip> So I started on the replacement of the leaking freeze plug last night.   Drained the radiator and the block.   The block was draining heavily rusted water the last few inches <snap> 
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