Sometimes the bloke in the Pub is spot on and does know what he's talking about,although in my case it was the bloke I was having a cuppa with , never go in Pubs, not since '82 anyway, I had my cylinder head changed last August and a few weeks later an oil leak appeared, garage that did the job klooked at it and said "looks like a faulty head " and wanted £60 an hour to investigate and report back, obviously they would have "found something". I mentioned it to the guy I was talking to, he gave me some advice and with the help of a few bits of clean cloth some meths and a bit of talcum powder found out the fault was with the fitting, back to the garage for the free repair.