I had a pulley on one of my cars - the one that drives the alternator and air con etc, it needed a new pulley, but could I get the nut off? - No, I took it to a garage and they tried their air guns on it - no dice, tried a second garage, and they had a suggestion, we put the socket on a long breaker bar, set it so the bar was about 6" off the floor, and while someone held the socket in place with his foot, turned the engine over, on the third attempt the nut came loose, I then finished undoing it and fitted the new pulley, tightened the nut to the correct torque and asked what I owed- Nothing was the reply, we didn't do that and you didn't see it - its not a recommended technique - well not by health and safety - we were on our tea break (nice guys, I gave them something for a pint down the pub after work)
Grendel