Quote:
Originally Posted by Gelbster
If you are dealing with a replacement of a water pump that looks like post #21 above - you need to find every broken part. Here is a little practical experience to go on but others may have more to contribute.
Remove the heat exchanger/oil cooler. Examine the coolant lines and passages there.Some pieces will lodge there.
My M96 engine had a new water pump fitted just before I bought it. When I dismantled the engine(another story) I eventually retrieved all the broken pieces from the previous pump(engine has 89,000 miles). I would guess that coolant circulation was reduced by at least 50% with the broken pieces.
If you can't find all the broken pieces from the old impeller -you are taking a big risk if you just slap in a new pump - regardless of the impeller material.
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Great point.
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