Skip the auto shop - Our mechanics make house calls

Q: What causes my car to keep overheating?

asked by on

My car started overheating in May. Firestone & my brother said my fan wasn't coming on so Firestone replaced the fan. It started overheating again in late July. It cut off on me and kept getting hot. It would act alright for a few days then it started getting hot again. It cut off on me after it overheated and I got home one day. I had the car towed to Firestone again. This time my check engine light came on. They replaced the spark plugs and ignition wires, the rotor and distributor cap, the heater comtrol valve, the water valve, the thermostat & the thermostat gasket, and the radiator. They did a fuel & induction decarbonization K cleaning, then a coolant flush with sealer and conditioner and antifreeze. The car ran fine for about 2 weeks, now it is running hot again. Firestone says it is an internal problem. They could not find a cooling problem. It did not run hot while it was staying still and running in the shop. Today when it ran hot, the antifreeze never left the resevoir.

My car has 210927 miles.
My car has an automatic transmission.

Thank you for writing in! Typically the thermostat and water pump are the primary sources of overheating on a 1997 Toyota Corolla. However, since the fluid never left the reservoir, it could be caused by a blockage in the coolant tubes; such as an air bubble. A good bet would be to have one of our local mechanics complete an overheating inspection. This would reduce the frustration of guessing and allow them to pinpoint the source of your issues; so that they could be fixed sooner rather than later.

Best of luck!

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Temp gauge goes up a quarter when headlights are turned on in both idle or driving

Hi there. If the engine is running at the correct temperature at all other times, except when you turn on the headlamps then you do not have a cooling system issue. Most of the time, this is a short in...

Q: I was changing my alternator and I stripped the last bolt really badly, what do I do to get it off?

Hello, thanks for writing in. I'd be happy to help. If ANY of the head remains, even if it is completely mangled, there are tools that can grasp the mangled head and remove it. If the bolt is spinning in...

Q: I need some tips on removing the thermostat

Diagnostic Trouble Code P0128 can set due to a faulty thermostat or a problem with the engine coolant temperature sensor or the wiring associated with the sensor. Although a faulty thermostat is the most common cause of P0128 it is...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...