In Reply to: Ford NAA crankshaft won't drop to remove old rear seal posted by Joel on April 11, 2019 at 10:46:23:
Not trying to be negative nelly here, but getting the old round part of the rear main seal out is only half the battle. I did not have any luck trying to replace seals with the crank in place. I tried both the original stylw wedge seals that you soak in oil and they swell up, and I tried the rubber wedge seals with the metal pin you drive in. I had no luck with either. I pulled my engine to drop the whole crank to try to get it to seal. Once I did that, I found enough wear to rebuild the engine. The good news was that with the crank out and engine on a stand, it was easy to use victor reinz sealant on the side wedge grooves. When I rebuilt the engine in my 860, I used the two piece seal at the rear main, then used victor reinz sealant in place of the wedge seals on the sides of the rear main cap. 6 years and no leaks.