Freeze plugs..
Hotshot
Joined: Oct 2002
Posts: 18,488
Likes: 22
From: The Big, Oregon
The concern with silicon is that most people slap it together, fill the system, and start the engine. The silicon will act as a lube for about 6-8hrs. depending on the type and temperature, allowing the plug to pop out.
Posting Guru
Joined: Mar 2003
Posts: 1,622
Likes: 0
From: nevada
I've never heard of using silicone or gasket juice to install a freeze plug. I never have, and why go thru the extra mess. I could see maybe some silicone on a cam plug, but thats an oil passage. I once found a freeze plug of the right size to plug the hole in my catalytic converter. Dont know how it came out, and it spewed ceramic BB's all over the road. Still passed smog tests for yrs afterward, even tho it was empty.
Cargo Master
Joined: Sep 2004
Posts: 2,691
Likes: 6
Turns out my 72 F100 had a rotted out freeze plug and had a tiny leak. I knocked it out (couple taps with a hammer on screwdriver) and when I read my orginal 72 Ford Truck Shop Manual the instructions for putting one back in said to apply a thin coating of gasket sealant to the outer edge of the plug before installing it. So there you have it, direct from Ford back in 1972.
Moderator
Joined: Dec 2003
Posts: 97,591
Likes: 2,008
From: Saskatoon, Saskatchewan
Originally Posted by qman
Turns out my 72 F100 had a rotted out freeze plug and had a tiny leak. I knocked it out (couple taps with a hammer on screwdriver) and when I read my orginal 72 Ford Truck Shop Manual the instructions for putting one back in said to apply a thin coating of gasket sealant to the outer edge of the plug before installing it. So there you have it, direct from Ford back in 1972.
