Quote:
Originally Posted by mikefocke
So if the rebuilt impeller fails you want to send metal through the engine? I've heard from at least two experts that the only water pump to use is the Porsche sourced one (and neither has a pro-Porsche bent).
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The way you say that implies that bits of metal are somehow more damaging than bits of plastic. Metal or plastic impeller, it seems to me the result would likely be same if it broke into bits small enough to make it in to the cooling system. I've had one impeller fail in a non-Pcar (Lexus), it was plastic and it simply split in half.
Whats the thought behind bits of metal in the cooling system being worse than bits of plastic?