I took a hammer and drove the business end of an extension attached to a Craftsman 8mm Allen Head socket up into the motor mount bolt on the 1984 300D. I then tried banging on the ratchet with a hammer but it didn't break the bolt loose. I then figure I might need a breaker bar to pop the motor mount bolt loose so I attempt to pull the extension and Craftsman 8mm Allen Head socket out. After I get it out, I look up into the mount and the allen head portion is still stuck in the bolt! It separated from the socket portion of the tool....is this normal? I'm hesitant to use this 8mm Allen Head socket to break loose the motor mount bolts.......