When the stabaliser went on mine it was More of a THud that couid be felt from inside the car , as you have got a clunk -iwouid check the other engine mounts and drive shafts, *The engine stabaliser does have a little play on mine but not enough to alow the engine too jump forward,*(get an assitant (or mate) to see if the engine jerks forward whilst you put the car in gear and move it forward to rule out engine roll stabaliser,) hope this helps mate, regards,