Anyone have any idea of the cost of headgasket replacement on a 1992 535i with 220,000 miles? I got a leak on the weekend and replaced the thermostat housing which was leaking but this just forced the leak to the head between the rear to exhaust manifolds were I saw a small leak a week ago. Car smokes when the leak starts. Now I am looking at a head redo. What else should I look at doing while in there? I have had an estimate of $1200 to $1400 for the head work without anything else. Is this about average? My mechanic does not try to screw me so I assume that all is cool with what he is recommending. Never bs'd me before. Sort of a large kick to the scrotum pole with this repair!