Over the past couple of days a metallic tapping like noise has appeared. It's as if you were to knock a solid peice of metal with a hammer. It's only doing it if the engine is labouring or if you jab the throttle quickly when its idling. It's not coming from the block but seems to be from behind the transfer box and in front of the cat. My initial thoughts were the dog bone as I recently fitted a VF engineering one but alas that's tight, as are the other engine mounts (Vibratechnics). I can very occasionally get it to make the noise if I rock the engine back and forth (quite hard with stiff mounts), although it's much quieter. The problem is, without a 4 poster, it's hard to get that far back! Any ideas? What's back there that could rattle? I knew these solid mounts would be a pain!