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Could be thermostat not opening causing a back pressure

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16y ago
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Q: When coolant coming out of 1999 alero from overflow and leaking water pump replaced water pump but still comes out of overflow could it be thermostat?
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Why is your Mazda 93 rx7 leaking coolant from the overflow?

Bad head gasket? Bad thermostat? Defective radiator cap?


What does it mean when coolant in overflow tank is low and is leaking antifreeze from that side of the car?

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