Frost plug installation.

[5.4MarkVIII]

Not a mustang but the old Plymouth. Uses the concave style frost plugs. (Not the newer cup ones)

Install seems pretty straight forward. Place in hole curve out.

Use large round punch to indent.

But the mixed messages seem to be weather to install dry or to put on some sort of sealant first.

Opinions?

[ZR]

I use gasket shellac on all hammer in frost plugs.

[5.4MarkVIII]

I use gasket shellac on all hammer in frost plugs.

K. I’ll pick some up. Some sources were saying just a rvt silicone.

Just wanted to make sure.

Thanks

[ZR]

All I can say, never a leaker to date.

[5.4MarkVIII]

All I can say, never a leaker to date.

That’s what I’m hoping to accomplish lol.

[Laffs]

I use gasket shellac on all hammer in frost plugs.

Permatex brown bottle?

[ZR]

Yes, several other similar products out there as well.