C15 2006 rear main seal leaking

No.......

Save your money, put oil in it until you can take it down to fix it correctly.

 

In my opinion, leak stoppers, for whatever leak, shouldn't be used at all. Except for maybe power steering as it's a system that's somewhat closed off from the rest of the engine. And if your replacing the pump, might as well do the hoses too.

As a teen, I helped my uncle at his auto salvage yard. It's amazing at how those additives can clog weep holes and greatly reduce flow inside an engine.

That said, I don't recall seeing anything of that nature in the oil system. Usually, it was the cooling system that had the issues.

I did see a lot of engines that were screwed up by Slick 50. That crap turns to peanut butter.

Again, my opinion.

 

Could be expensive but do it right. Chances are it’s not only the rear main. Likely rear engine housing gasket needs to be changed too. When I got mine done at cat they put clutch, housing gasket, rear main seal, motor mounts, and main bearings since the pan has to come off too

 

Don’t forget the transmission cooler lines. They get brittle over the years.

 

How much oil do you need to add?