Originally Posted by John_Kunkel
Originally Posted by Moparteacher
I fill in the sides with RTV and then slide in a piece of copper rod to expand the RTV. Trim flush.


A water-dampened pipe cleaner to expand the RTV works better. RTV sets up by exposure to moisture.


Great info on the pipe cleaner. I'll do this on the next build. FWIW, RTV=Room Temperature Vulcanizing.