[techweenie]

It's a 1975 911S coupe. Not rare at all. The '75 used thermal reactors to meet emissions requirements at the time and those reactors created and retained heat that 'soaked' the cylinders and studs, causing the head studs to expand and contract and work their way out of the case. Repair is very expensive, since it requires total engine disassembly. Not sure if this car could be pulling head studs or not with those miles. But head studs are easy for a mobile Porsche mechanic to check. If you're thinking of buying, consider the head stud integrity to be a go/no-go factor.