Freeze plug replacement

[Terrorizer]

One of my freeze plugs seems to have a small leak, so I am going to replace it. My question is do I need any thing else besides the actual plug itself to replace it?

thanks in advance

 

[luigisho]

I've never replaced one but I used to see a gasket shellac people used when replacing these. Also seen them do the plugs in the freezer before installing method. You'll probably have to clean around the area to get a clean smooth surface before installing new plugs.

 

[TimboSHO]

I've always used permatex aviation sealer around them to make sue they seal. Make sure you can get a good straight shot at it to get it in at the right angle as well. Which one is it?

 

[Terrorizer]

I've always used permatex aviation sealer around them to make sue they seal. Make sure you can get a good straight shot at it to get it in at the right angle as well. Which one is it?

Its on the rear cylinder bank facing the firewall. Are there multiple freeze plugs on each side? If so I want to say its the one in the middle but I don't remember for sure.

 

[sperold]

On the old forum that was saved as Wikisho, there was a description of how to install a block heater. It did not fit in just any freeze plug location (maybe 3 per side) as the cylinder casting is too close to the opening to allow the install of the element on some locations.

I tried to look it up, but the site is fighting me.

That write up told you what size of frost plug is required as well.

It is a messy job, as the coolant runs out on you when you knock out the old one.

Usually you tap on the outer diameter of the frost plug and it swings like a throttle plate to the point you can get a small vice grip on the opposite side, and yank it out.

 

[jimtash]

I use shellac to seal them. And always tap them in using the edges. Otherwise you risk deforming the plug and having it leak again.

 

[itwonder]

It is a messy job, as the coolant runs out on you when you knock out the old one.

Still messy, but less so if you remove the front and rear block drain plugs to drain the block before knocking out the freeze plug.

 

[Eric VerValin]

I see I am a month late here but yes Permetex sells a sealant for it and I put new brass ones in my short block when I built my motor. I actually found a big socket that was the same size and used that to tap them into place. I had the block sitting on a stand and had it turned the right direction when I did it... made it a lot easier. Good luck.