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The impeller is composite and everything was in very good shape with the exception of my thermostat which looked like junk. Even the o-rings on the connection tubes were still really good and made an audible seal when pressing the housing back on.
I have 120k miles and got the increased emissions CEL ( P0128 ) which is related to the t-stat and decided to just knock out the water pump at the same time.. because.. well, its a BMW.
Last edited by lagwagon; 08-18-2014 at 01:21 PM..
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