In the process of changing the thermostat at the moment to try and fix a poor heater performance. Using a mirror I looked inside the throat of the water pump (where the thermostat goes) and noticed a jagged edge (see photo). Can anyone tell me if this is normal or should I look at replacing the water pump as well?
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Looks like erosion from the water. Maybe cavitation.
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Thanks for that. Can anyone tell me how much metal is missing or perhaps post a picture of what the pump should look like from that angle. I don't have access to a pump to look and see.
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