kingbling":h4hdoqz5 said:Wire brush the internal threads first and make sure they are spot less check to see if it has been cross threaded if not plenty of grease on the new cup and work it back and forth until it screws all the way in, if you can't do that take it to your LBS and have them do it.
danson67":2musb1yy said:I have the requisite tools if you want to borrow, or happy to run the tap through for you.
PM if viable option.
All the best,