Hi there this is my first post.Picked up a starlet last week had a new clutch fitted and rear main seal fitted.After it was all put back together it then developed a substantial leak which afterwards I was informed it would be due to not being a genuine Toyota rear main seal.I then picked up a genuine seal then had that fitted but it's still pissing oil.Is there any other common faults or things to look out for as I'm not doing the work myself the garage is.This is now my daily and due to the leak I don't really want to be using it so any help would be appreciated.Cheers