Q: My car is overheating and constantly filling with water

asked by on

Overheating must fill with water constantly Leaks water from passenger side of engine. Changed radiator, hoses, thermostat/still leaks and must be filled.

My car has 120000 miles.
My car has an automatic transmission.

Thats a good question. I will go through a few steps you can take to see where your problem is occurring.

  • Get a UV light and dye to put in your coolant.

  • Run your car until it is at operating temperature and turn the car off. This will cause pressure in the system make your leak more present. You may even want to get a yellow set of glasses so you can see it better.

  • Is your upper radiator hose excessively tight? If so, you have a faulty thermostat. Sometimes you will receive faulty parts even when they are new.

  • Can you see fluid on the ground? Where is it? If it is in the front of your car, look at the front side and back side of your radiator. If your radiator is wet you have found your problem. If you don’t see the leak, check your oil.

  • If your oil is milky or contaminated then you have a problem with a blown head gasket. (These aren’t the only signs of a blown head gasket, though).

  • Is your air working properly? If your car isn’t heating or cooling properly you may have a clogged heater core.

Note: there is one more issue we need to check. When you look at your coolant, does it look like its mixed with different colors? Green, yellow, orange, pink, or purple? If so, this is your problem. You will have to flush your system vigorously, maybe around 5-10 times to fix this. I have seen this many times as a technician. You should never mix colors of antifreeze because it will start crystalizing in the engine and radiator. If you need assistance with any of this, a certified technician from YourMechanic can come to your home or office to inspect the coolant leak.

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 overheating and constantly filling with water

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: Transmission warning

Hello. It sounds like you either have a bad connection at the battery or the issue is with the transmission position sensor. If the sensor fails then the computer will not allow the vehicle to start. The car is only...

Q: It has been a warmer February day, but high only hit 68, so what could cause a water leak under the car?

Hi there. The leak seems to be coming from the windshield washer reservoir. Look under the vehicle with a flashlight and on the washer reservoir tank and see if there is water droplets coming off of it. If so, then...

Q: My car inadvertently got coolant into the engine through a broken seal and . 1.5 gallons. What is the worst i can expect to happen

Hello, and thank you for writing in. With such dramatic failures and so many opinions, it is easy to become confused and worried. Checking the oil at this point will not tell you much. Any metal shavings that have come...

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...
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...
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...