Re: Freeze plugs? What is that? - Saab 900 Bulletin Board - Saabnet.com
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Re: Freeze plugs? What is that?
Posted by turbocon86 (more from turbocon86) on Tue, 6 Dec 2011 10:22:04
In Reply to: Freeze plugs? What is that?, darcey, Tue, 6 Dec 2011 09:58:31
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Freeze plugs (or expansion plugs) are plugs pressed into openings in the block. They are there to help prevent the block from cracking if you have a situation where the coolant freezes. They will pop out of the block as the coolant expands when freezing. All motors have them.
The two up near the top of the block near where it meets the head are not fully bathed in coolant when the motor isn't running, so they tend to rust from the inside out. You can watch videos on YouTube on how to replace them. It's a relatively simple task if you get the correct sized ones.
1.6250" is the correct size. I use Dorman #555087. 2 needed per car.
posted by 64.128.17...
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