smh00n 77 Report post Posted May 7 Folks My new Scott Drake Boss 302 sump is leaking from the rear main seal. It's basically a new motor with 100 miles on it. It has a Felpro one piece rubber gasket on it. Late model motor with the one piece crank seal so I could discount that somewhat I think. I used some silicone around the outside edge when I put it in. When I assembled it, I noticed it leaking with just the assembly oil in it, so I pulled the sump and put Dow Corning silicone on it. Even though Felpro say it doesn't need it, I did think the radius of the seal on the sump itself was a bit off. I used the silicone both sides of the gasket and packed the corners a little bit. Before I drop it again, is there an issue with the sump pressing? I don't want to just keep adding silicone if it's not going to ever work. Quote Share this post Link to post Share on other sites
smh00n 77 Report post Posted August 7 I dropped the sump, added about a 1/3 tube of Dow Corning black silicone to each end. After about 50 miles, no leaks. Hoping it stays that way. Repop trash...... 1 Mach1 Driver reacted to this Quote Share this post Link to post Share on other sites