smh00n 90 Report post Posted May 7, 2023 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 90 Report post Posted August 7, 2023 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