Q: My car runs hot, then cools down, and then heats up again

asked by on

Car runs hot then cools then will heat up again. I I have no warm air coming into the car when the car is running hot I've been putting antifreeze in but it's using it up as fast as I can put it in is it possible that my water pump is bad

My car has 149688 miles.
My car has an automatic transmission.

Hello. Your attention should be turned toward the fact you are going through a lot of coolant. If you can not visibly see a leak spraying or any evidence of a leak on the ground, then your engine is consuming the coolant. You should check your oil and see if there is any milky looking fluid or residue there. This is going to tell you whether coolant is mixing in with your oil, and the cause in this case would likely be a failed head gasket. These are easy to replace, but very hard to access, making for a tricky repair. Not that we recommend inhaling exhaust fumes, but if you smell a sweet odor coming from the vehicle, that too is a sign you are burning coolant. A cracked head will also cause this symptom. Further testing and an inspection by a certified technician, such as one from YourMechanic, is needed to properly diagnose your coolant level problem.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My car runs hot, then cools down, and then heats up again

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: No thermostat new water pump still overheating

Running an engine without the thermostat can cause the engine to overheat due to the coolant passes through the engine too fast and will not let the coolant absorb the heat from the engine. If you reinstall a new thermostat...

Q: Q: Car won't start

Hi there. Usually when you hear a clicking sound when you attempt to start the vehicle, it's because the starter motor won't engage. It's possible that when you replaced the starter, the starter relay that supplies power to the starter...

Q: Engine overheating even though coolant fan was running

This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.