In Reply to: 801 rear main seal posted by Jeff in Northern Michigan on November 11, 2020 at 21:05:21:
The side seals on the rear main cap is an area that can be an issue. The original style seals were designed to swell with oil contact. Another style is a rubber seal that gets a small steel rod driven into. I did not have luck with either of those types. I ended up using Victor Reinz sealant in the sides of the rear main cap. Seven years now with no leak.