freeze plugs

[Michael F.]

what size are the freeze plugs on the side of a 66-67 big block??

[Joe L.]

Re: freeze plugs

what size are the freeze plugs on the side of a 66-67 big block??

Michael------



1-3/4". GM #3743389 and still available from GM. However, these are steel plugs. I prefer brass.

[Michael F.]

Re: freeze plugs

thanks, do you use any sealant or install dry, thanks and I like brass also.

[Joe L.]

Re: freeze plugs

thanks, do you use any sealant or install dry, thanks and I like brass also.

Michael------


Always use sealant. Permatex #2 works well or you can even use RTV.

[Mike M.]

Re: freeze plugs

glass bead the exposed surface of the brass soft plugs so paint will stick to them.mike