Question:
My grandfather drove up today in his Camaro and shut the car off, and I walked by it maybe 10-15 minutes later and heard a boiling noise, so I went and got him and we looked under the hood and sure enough the coolant was boiling. He says that's normal and water boils at 220, we are at sea level, and that nothing is wrong. I say it's not normal and something's wrong. Who is right?
Answers:
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He's wrong, if it boils something is wrong and does need to be corrected...It's probably boiling because it's straight water and not antifreeze... Antifreeze has a lower freezing point and a higher boiling point than straight water...The engines normal operating temp is higher than waters boiling point... When the water begins to boil it can't cool the engine... Also a faulty radiator cap will cause that, it has to be able to hold certain amount of pressure, the coolant has to be under a certain amount of pressure to keep from boiling like a pressure cooker...You can call any parts store to see what pressure range the cap for your particular model is suppost to be...When you park a car and turn off the motor the water pump quits working, so the coolant temp in the block continues to increase in temp( temp gauge is located in the motor) If you start the car and drive it around the block the temp will drop to operating temp.
Number 1. Water boils at 212 deg. F at sea level. 2. Why does Gramps only have water in his cooling system ? You said the cooling fan comes on when the key is turned on, O K that's working and you are probably right about the thermostat. Pops is the loser. Ah, Norm, the sending unit is located in the engine, not the gauge.
It's not normal. Your cooling system isn't at sea level. It's suppose to be pressurized, which raises the boiling point. The antifreeze raises it more. You either have an unpressurized system because of a leak or bad cap, or you're running pure water.
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