Yup, they do that a lot. Most 89+ I know with the "liquid mounts" have broken the mounts at least once in their lifetime. ~$90 each from the dealer too. Your other option is to transplant the subframe from a 86.5-89.5 and use the square mounts. Or buy aftermarket for about the same price as dealer, but they will last forever. Only prob is all the aftermarket ones I've seen are pretty much solid, there will be a good bit more engine vibration coming into the chassis.