[quote="bigs1975"]I don't know If I buy the syn oil eating seals but I was a GM tech an these 3.1 motors just had problems leaking oil.The 2 main places were the intake and the oil pump drive.I hardly ever seen crank seals leak unless theres a ton of miles on it and had excessive crank endplay.[/quote
I agree your crank seal leak can be your oil pump drive. The intakes
always leak but gm has come out with a new gasket sometime ago and seems to work better......