Why does my car overheat only when idling?
If your car begins to overheat when idling, but the temperature gauge moves back down once you get going, it’s most likely due to a broken radiator fan. When the coolant goes to the radiator, it’s spread over a large surface area to cool it down. Airflow further cools it before it returns to the engine.
Why is my car overheating but not hot?
As a general rule, you can say your car is running hot but not overheating because of a problem with the cooling system. Cooling system problems include a failing water pump, low coolant level, old coolant that is no longer effective, a faulty engine coolant thermostat or a faulty auxiliary fan.
What to do if your car has no heat at idle?
With the cabin heat turned on and engine at operating temperature. Idle for ten minutes before shutting off the engine. Locate the heater core hoses, they’re fitted on the fire wall behind the engine. Grab both hoses, both should be roughly equally warm, if not, the heater core is blocked.
What should I do if my engine is too hot?
Engine cold before proceeding, hot coolant will spray from rad or reservoir cap if opened when hot. Check engine temperature throughout this procedure, if engine gets too hot shut off vehicle. Using a no spill funnel makes filling and bleeding a ton easier, you can check one out here on the Coolant system tools page.
What does it mean when your car coolant hose is cold?
The engine needs to be really hot and almost overheat before the thermostat lets the coolant pass by. If your car is not overheating, but the lower coolant hose is cold when you feel it – it may just mean that it is not hot enough, and therefore there is nothing wrong with your engine.
Why is the air still hot when the heater is idle?
That should not matter. When the cooling system has no air in it, the air would still be hot even at idle. I think you have an obstruction in the line that feeds the heater core.