Better coolant crossover leak repair?
I am going to attempt the crossover gasket repair on my 07 3.5 G6 myself this time. I have read a lot of info from different sources on the process and parts used. My question concerns the mention of using a dorman plug Dorman 090-108 - Pipe Plug C.S. Hex to block the empty hole on the earlier tube.. Is the hole already threaded? Is it installed after the crossover tube and new gaskets are back on the heads or before it is installed? Has anyone used any type of gasket sealer such as High Tack or right stuff on these gasket mounting surfaces before bolting the tube back on? Any help will be much appreciated. Thanks