Diehard--Once again, I'm no expert, but I don't think motor mounts would cause your f.d. to break un less they're extremely bad. I've got one with bad m.m. causing the car to shake at idle. It's not bad enough to make the familiar "motor mount knock", which happens when the m.m. get really bad. My discs are fine in this car which has been driven for several thousand miles with this conditon. And will continue to be driven until I hear the "knock". I will keep a close eye on my discs after this thread!

Cheers,

Bill