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24/11/2020 8:50 pm
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I replaced the oil pump on my 2000 chevy silverado 5.3 Lt With 405,000 miles. I put back the same old water pump and just change the thermostat. After doing this there was to much pressure in the coolant reservoir and cause a overflow. Everything was working fine before changing changing the oil pump.
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@mountainmanjoe
Forgot to mention of a bad water pump,
I think my water pump is not moving the coolant. Because it use to work before i took out but once i put it back in it didn't work properly.