would the bad ring/ head gasket be causing the rattling problem. I've just started noticing the sound since the over-rev incident. also when i put in the clutch to shift, and the revs drop, thats when it makes the weird fuzzy sound. this weekend i'll try to flim / record the engine sound. anyone know where I could post the video or sound clip so u guys could hear it? that might help with diagnosing the problem.