Skip the auto shop - Our mechanics make house calls

Q: Radiator issue

asked by on

I filled my radiator with coolant, didn't notice any leaks, yet my temp gauge goes to hot after a few minutes of driving. Doesn't happen while idling though
My car has an automatic transmission.

If the cooling system was "empty", it has to be re-filled while purging trapped air. Some vehicles are equipped with purge points. If there is trapped air in the cooling passages, that can cause overheating as trapped air impedes coolant flow. If there is no trapped air in your circumstance, among the most common causes of vehicle overheating are a stuck closed thermostat, a partially plugged radiator, a defective radiator pressure cap, a water pump that is not driving at engine speed due to a loose drive belt and/or a collapsed lower radiator hose. Operating while overheating is a significant cause of engine damage, due to the warping of the head and/or block, and so it is recommended that you request an engine overheating diagnostic. The responding certified mechanic will identify the root cause(s) of the overheating and give you an estimate of the cost to get the faults repaired.

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: How do I select a play mode while using an iPod?

When playing an iPod through the audio system, you can use the audio controls to select the play mode for the iPod. To do so, press the Setup button, then rotate the selector knob to the desired play mode, and...

Q: Check engine light on and the P0128 code is showing

The P0128 code is most likely caused by one of the following three issues: a faulty thermostat, a faulty engine coolant temperature sensor, or a processing error in the ECM. The coolant temperature needs to measured using a temperature gun...

Q: Oil pan

Hi There, When the threads in the oil pan drain plug are stripped, in some cases they are able to be re-threaded and used properly again. In severe cases, unfortunately depending on how bad they are stripped it may be...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...