Q: My car is getting overheated, replaced the water pump, but coolant is still running out.. After the car warms a lil..

asked by on

Coolant is running out the car, replaced the water pump yesterday, coolant still flowing out, after the car is crunk about 5min..do you think I need a thermostat?? Or what could be the problem

My car has 128000 miles.
My car has an automatic transmission.

A thermostat is a good first step with overheating issues, usually because it’s inexpensive and easy to replace. So it’s always good to eliminate that as a possibility, but I think you may have more problems then that. I presume you mean that coolant is running out of the overflow tank. This happens because of excessive pressure in the cooling system. It can happen if the coolant is low, because air pockets in the system cause hot spots where the remaining coolant will boil. It can be difficult to get all of the air out of the system so that’s a possibility especially since you just changed the waterpump. It can also happen if there is combustion pressure leaking into the cooling system as it does with a bad head gasket.

When you change the thermostat, find a heater hose or some other small cooling hose near the top of the engine and disconnect it. Refill the engine with 50% diluted coolant until coolant runs out of the hose you disconnected, then hook it back up. Run the engine with the defroster on maximum until you feel heat coming out of the dash vents, checking the coolant level periodically. When you feel good heat, you know the engine is full. If you continue to have a problem, contact YourMechanic and they will send a technician to your home to diagnose your cooling system and tell you what you can do.

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 is getting overheated, replaced the water pump, but coolant is still running out.. After the car warms a lil..

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: Washed Engine Now Car Won't Start

Washing an engine is a risky business. If you're going to have it done, it's best performed by a technician who will know where NOT to direct the spray. Now that it has been done, you could have a failure...

Q: Rough idle new spark plugs coil packs bank 1 and 2 number 2 02 sensors fuel filter air filter maf sensor

Hello. I suggest that you test the idle air control valve operation and check the throttle body for excessive buildup. Both of which can cause erratic idling. At your particular mileage it will be a great idea to have your...

Q: I have a mini r53 s (supercharged) runs fine but when car stop and AC is on for a wile car overheat

Your question makes me think of a case I ran into a few years ago. The owner had modified his car but when he installed his fans, one of them was wired backwards so the fan ran in reverse. The...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.