Skip the auto shop - Our mechanics make house calls

Q: Wont let me add coolant/water to radiator after it is drained

asked by on

I emptied the radiator. When I went to refill it, it wouldn't take any fluid. How do I get the radiator to let me add to it?

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

You have to open the small bleed screw below the fill cap on the engine. Use a hose connected to the nipple to catch any fluid so it will not get on the belts.

Pinch off the overflow hose and fill the engine until no more air comes out of the bleed screw then close the bleed screw and install the cap and clamp off of the overflow hose. Then fill the overflow reservoir to the full hot level. You may have to add more fluid after the car runs for 3 or 4 hours to top it off completely.

If you need some help with this, consider YourMechanic, as a certified technician can come to your location to service your coolant.

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: Possible electrical problem

Describing the symptoms is very important when your car is not running like it normally does. Only you know what the car usually acts like. If the vehicle is: not starting, blowing fuses, having battery trouble, showing flickering lights, etc.,...

Q: BATTERY AND BRAKE LIGHT ON AND WONT GO OVER 20 MPH

It sounds like you may have a faulty or sticking brake light switch. When this happens, this creates a draw on the battery and the electrical system as the power is being directed to the brake lights. As a result...

Q: Car keeps overheating and losing antifreeze. Thermostat and hoses are all fine. What else could it be?

Hi. I believe your Hyundai has a blown head gasket. This failure mode may not contaminate engine oil with coolant as sometimes occurs. The lost coolant may go into the cylinder or the exhaust instead. A slightly sweet smell from...

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...
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...
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...