I have an A112 70hp Abarth engine in my Fiat. I installed the Triger timing belt to replace the chain. I am having oil leaks and have replaced the oil seals twice, yet still getting leaks. I was told it could be coming past the bolt that secures the hub at the end of the camshaft. Anybody have a similar experience? Any suggestions on how to remedy? thank you.

Here is another photo.