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TR2/3/3A 3A freeze plug on the back of the head.

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Tinkerman

Tinkerman

Darth Vader
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Evening All:

Looking at the head the other day and realized that I had not replaced the freeze plug on the back of the head. Stanpart number 27378. Does anyone know the size of that plug? I hate to pay $1 for the plug and $9.95 to ship it. Bet I can find a replacement at a local parts store. Just afraid that I might destroy it getting it out.
Anyhow, any thoughts would be appreciated.

Thanks, Tinkerman
 
I agree if it's not broken, don't mess with perfection.

But to answer your question (kind of), it's not a typical pan shaped freeze plug. But rather a special cupped washer.

To install, you insert it convex side out then tap the center so that it flexes and pops inward and holds in place. Mine was installed with a liberal application of epoxy to seal around and over the edges. Sorry I can't provide the size detail.
 
No, no rust through and no apparent sign of rust. I like yall's idea, I have enough other things to worry about!

Thanks fellows. Tinkerman
 
Tinkerman said:
...Does anyone know the size of that plug? I hate to pay $1 for the plug and $9.95 to ship it...
Click to expand...

This is why I love having a local Moss distributor -- you have to pay sales tax but for small stuff it's on the shelf with no shipping or waiting. Might be worth finding out if there is one in your area.

That plug is a really strange size... possibly because the hole is a nice normal size and the plug has to be just a scosch smaller so it fits in and then expands as it's flattened.

Likely okay to leave the old one... but know that if it does fail on the road it can be replaced w/o pulling the head by using one of those rubber freeze plugs with the the washers, nut & bolt arrangement: You insert the rubber plug then turn the nut to squeeze the plug causing it to expand in diameter to tightly seal the hole. Had to do this far from home once and it worked out fine.
 
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