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I had to post this here. It might be worthy of an award. I think the last five failed water pump impellers were in there https://uploads.tapatalk-cdn.com/202...e1f222c1c8.jpg
https://uploads.tapatalk-cdn.com/202...e710b9c377.jpg
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Wow! So your heat exchanger is on the pressure side of the raw water pump?
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Interesting. I change the impeller annually to prevent that, but I did have a small chunk of one impeller flake off a few years ago. Now I know where to look for it!
That is interesting. My '86 has the trans cooler on the suction side so I'm not sure where chunks would accumulate. Thermostat housing, I suppose. I install a new one every odd year, and remove it every year so that it drains completely, and I store the impeller in a relaxed position, out of the pump over the winter.
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