Q: Steam from under hood with antifreeze smell

asked by on October 17, 2017

I had a major antifreeze leak one day and ended up being the radiator went bad so I got it replaced. The next day, on my way to work, it starts steaming or smoking under the hood were the reservoir tank sits. The vans not overheating at all but the temp needle does move doen and and up around the normal notch just a little bit. What else could possibly be wrong?

My car has 232000 miles.
My car has an automatic transmission.

It might be that the cooling system was not completely filled. If the technician was in a hurry, he may not have given the engine time to "burp" while filling the system. To correctly fill the cooling system , the car has to be run for a period of time with the heater on and the radiator cap off so that air pockets can work their way out of the system. If you would like to have this checked for you, contact YourMechanic. They can send a technician to your home or office to top off your cooling system for you right there on the spot.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Clutch pedal sinking to floor
You might be right. The slave cylinder is a hydraulic component. When it leaks either internally or externally, it will cause a symptom such as the one you are describing. In your vehicle the transmission need to be removed to...
Muffler clogged
A muffler can become clogged from catalyst material breaking loose and working it's way down the exhaust or an internal failure. Some mufflers and resonators are filled with fiberglass that absorbs some of the noise in the exhaust system. If...
A/C stopped working
I would suggest checking the flap vents inside your vehicle's air conditioning ducts. These vents open and close the direction of air flow. If the rear vents are working correctly, then it is likely not the A/C compressor or blower...
Rattling noise
Noises such as this require some creativity to locate. The first challenge is recreating the noise. It is good that you are paying attention to the conditions it occurs and does not occur during. These kinds of details can help...
Dashboard lights out and something draining new battery
Hello there, thank you for asking about your 1957 Chevrolet Bel Air. Checking for parasitic draw on a battery can be done by inserting an ammeter in series with the negative battery cable, then removing the fuses one by one...
When changing the car battery, do you "register" the battery to the car computer?
Hi there. Changing the battery has nothing to do with programming a battery. If the car was flat dead with a battery that lost all of the power because the dome light was on, then when jumped the vehicle will...
I've recently had the driver's side spring done along with the pads and discs on the brakes. Since getting my car back it is now making a clicking noise.
Hi there. The noise could could be the suspension being loose or the brakes could be sticking on at first. Check the suspension out and see if there is anything that could be loose. If the suspension is tight, then...
Hey my check engine lamp work but my Rom and speed lamps do not what could cause this
The instrument panel has quite a few separate bulbs. You may have a circumstance where some of the bulbs are faulty and need to be replaced. If you are referring to intermittent operation though and/or gauge malfunctions, the cause could...
Acceleration problem
Hi There, A number of things may cause the car to hesitate when accelerating. This is commonly caused by a faulty fuel pump (https://www.yourmechanic.com/services/fuel-pump-replacement), a dirty or faulty mass air flow sensor (https://www.yourmechanic.com/services/mass-airflow-sensor-replacement), dirty or faulty fuel injectors (https://www.yourmechanic.com/services/fuel-injector-replacement) or...

Related articles

Signs Your AC Needs to Be Recharged
If you feel the AC is not cooling as much as usual, cannot hear the AC clutch engaging, and see refrigerant leaks, you may have to recharge your AC.
Symptoms of a Bad or Failing Water Pump (Auxiliary)
Common signs include no warm air or fluctuating heat coming from the heater, the window defroster not working, and high pitched buzzing sounds.
How to Calculate the Concentration of Coolant in a Car
A car cooling system works to transfer heat from the engine. Check antifreeze level and condition, and mix coolant with water to prevent overheating.