Relplaced rear main seal still leaks can crank be bad to cause this how wiI know on 1998 Mazda Protege

If crank is that worn wouldn't rod knock?

Asked by for the 1998 Mazda Protege
1 answer
No. There may be a groove in the crank where the seal rides causing the new seal to leak. Or the new seal wasn't installed correctly and was damaged when installed.