Q: Car overheating, but reservoir full

asked by on

My car is running hot. The water reservoir is full. Could it be the water pump?

To start, a coolant pressure test should be done to check for any leaks in the cooling system. If there are leaks, the coolant level will be low and there will be air pockets in the system causing frequent overheating. If the thermostat is stuck closed and the coolant can’t recalculate, then car can overheat. The water pump can be damaged or defective causing the same issues. A cooling system inspection should be carried out by a qualified technician like those at YourMechanic to diagnose the overheating issue. Also, have them install the correct temperature thermostat with a coolant flush to ensure the right distilled water to coolant ratio, usually being 50/50.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Car overheating, but reservoir full

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: Do I repair the engine or timing chain?

With this engine you have to remove the engine to do the timing chains for both heads. One chain is in front and other is in rear of engine. Since you have such high mileage on the engine already I...

Q: How many transmission mounts rubbers does my car have?

Hi there. There are 3 different mounts used for your vehicle. There is a left engine mount and a right engine mount and a transmission mount. Both the engine mounts are the same and the transmission mount is flat and...

Q: My car would not go when I pressed the gas .

For certain, your engine shut off abruptly, never a good thing. Although you don't mention how many miles are on your Explorer, there are any number of possibilities for this behavior, including: engine timing chain failure, ignition module failure, fuel...

Related articles

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...
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 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.