We have a 99 Chevrolet blazer 4w drive it has a 4.3 motor in it well it started out that it needed a new flywheel so we put one in then the starter acted like they were going bad about every week or two the the starter bolt broke off just past the thread it was still in the motor so we got another bolt in it and within a half HR it broke exactly the same way then my boyfriend noticed that the motor mounts were loose can someone please help