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Open the radiator cap, rev the engine and at the same time check to see if the radiator is flowing. if so, thermostat is probably stuck open. I'm having the same problem. I boiled the thermostat and it worked as it should at the proper temps. Could the water pump impeller be loose from the shaft? My car doesn't run hot, but I just bought it and have only ran the engine at temps below freezing. Could an air intake door to the heater be stuck open? Thanks.

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โˆ™ 2005-02-27 13:35:33
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Q: Why would a 1995 Ford 3.0 engine run so cool and not create heat for the heater and not build pressure?
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