[davidimurray]

Rapidtornado - Just a word of warning - be very careful with chemical metal. We used to use it to plug empty holes in throttle bodies. However one day, one of our engines started running badly on the dyno. Compression test showed one cylinder was 'ill' on stripping the head off I found a small pellet of something hard, a bent valve and a 'ding' in the top of the piston. After some head scratching and seraching we realised that the pellet was chemical metal that had previously filled one of the holes in the TBs. It had been in there for a couple of years on various engines. After that we always made aluminiun plugs and pressed them into the holes.