Skip the auto shop - Our mechanics make house calls

Q: How do you know when the thermostat is stuck when the meter is broken?

asked by on

My radiator is full to the brim but the tank is always low for the most part. It's a class 2 leak of coolant
My car has an automatic transmission.

Hello. If the engine is leaking coolant then the reservoir is always the first part to read low. I usually start by checking for any visual leaks on the ground or on the engine. The most common cause of a coolant leak on this engine is the intake manifold gasket, the radiator, or the water pump. If no visual leaks can be found then I would do a pressure test of the engine as the pressure would help to produce the leak. If nothing is found at that time, then a dye test could be done to find the leak. If you want to have this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the leak and move forward with the proper repairs.

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
  1. Home
  2. Questions
  3. How do you know when the thermostat is stuck when the meter is broken?

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: Overheating after replacing water pump, thermostat and coolant temp. Sensor

Hello. That hole in the water pump is there to let you know when the bearing in the water pump is failing. It starts leaking when the bearing is going out so that it will be replaced prior to a...

Q: Leak

Hi, thanks for writing in. The water pump is driven by the serpentine belt so if you are seeing coolant coming from there it is likely that the water pump has failed. In order to verify this diagnosis, I would...

Q: 99 mercury cougar with a 4 cylinder leaking antifreeze from the overflow hose but car is not over heating could it possibly be the

The first thing you should have done is to have the reservoir pressure cap checked to see if it is able to hold pressure specified on the cap. If the cap cannot hold pressure then it will leak out of...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.