[Jake Raby]

The oil leak was originally coming from that questionable bolt. It was wicking up the threads and leaking from under the heads and appeared to be a pump leak. These pumps simply do not leak; their profile rings seal them up well.

You'll need to restore the threads for that fastener to have any chance at sealing. There are times that a 1/4"-20 SAE bolt can be used in that one position to create a fix for this, BUT thats a hack way of doing it, even though it works well for taking the place of a stripped 6mmX1.0 fastener.

Or you can install a timesert or hell-coil to restore the threads.