Rear main seals are cheap, usually only a few bucks. The problem is the labor involved as the transmission must come out to change the seal. I had a bad rear main leak on the Explorer I purchased in October. I researched a lot on stop leaks and tried blue devil rear main sealer along with 10w30...
I recently had the engine rebuilt for my Merkur XR4Ti. It is a Ford 2.3L Turbo SOHC. The engine was built with factory specifications on the bearing clearances. The cam is a hydraulic slider cam, not roller followers.
I have approximately 3000 miles on the engine at this point. I have changed...