Q: Evaporating coolant

asked by on February 11, 2017

Been running out of coolant faster then usual so I tried to burp the coolant system to get rid of any air. Long story short at 190-200 temp the coolant in the reservoir wasn't moving anywhere except steam was coming out of the coolant fill. I've already done the cardboard under the car so no leaks and I checked the oil and it's not milky. After a long drive I'm noticing the coolant overfill has steam coming from it. Best guess is it's either the pump or the thermostat valve that's not getting the coolant through out the system. If someone could give me a little advice that would sure be great. Thanks for listening

My car has 185204 miles.
My car has an automatic transmission.

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

How do I set the cruise control?
When you’re cruising down the highway, you may want to give your foot a rest while driving. Cruise control keeps your vehicle at a constant speed as you travel. This setting is adjusted by a small lever on the right...
Bad spark plug
If the spark plug isn't firing, the spark plug gap could possibly be to wide from high mileage. This plug could also be physically damaged or the spark plugs porcelain could be cracked. If the spark plug wires are cut...
Oil leaking from front of van
If the oil is coming from the driver's side front corner, you may have a transmission fluid leak (which is common). If the oil is coming from closer to the left, the fluid may be a number of things. I...
oil usage
In my experience with engine oil consumption I have seen some engines use less than a quart in 5000 miles and others use one quart every 1000 miles. The only way to know exactly how much you are using is...
Found one black pipe detached when I opened the hood.
Hi there. The black pipe on your engine is the air intake tube. There are two different tubes. On tube goes to the air box where the engine air filter sits in. The other tube goes to a resonating chamber...
No spark 1998 Jeep Grand Cherokee
Hello - your symptoms suggest someone may have "worked on" this without your awareness of what might have been done. Hate that! You will likely have to get out a voltmeter (https://www.yourmechanic.com/article/the-best-tool-for-mechanics-to-diagnose-electrical-issues) and start following the electrical path to the...
Power Stroke
Hello, As you know, there are 4 parts to the combustion cycle; the intake, combustion, compression and exhaust. The intake stroke takes place as the piston begins at top dead center (T.D.C.) and ends at bottom dead center (B.D.C.). In...
Brake, Battery sensor, lights, and a crackling noises.
The issue sounds to be a ground return wire on the speakers is shorting out with a ground circuit in the vehicle causing the lights and sensors to register a warning light. The brake light could be coming on for...
Just had my transmission oil leak fixed and now my car is acting up, when I'm slowing down it starts to like stall n then it stops
Hi there. Typically a slipping transmission will not cause the engine to vibrate and shake while the vehicle is in gear and nearly stalling when you stop. This is typically caused by a fuel system component failure, such as a...

Related articles

The Best Used Cars to Buy for Occasional Drivers
Not Not everyone relies on their car on a daily basis. Maybe you aren’t the type that deals with a daily commute, and running from here to there constantly. If that’s the case, you may be looking for a car...
Understanding the Pontiac Oil-Life Monitor and Service Indicator Lights
Car symbols, or dashboard lights, are a car service reminder. The Pontiac Oil Life Monitor (OLM) indicates when and what service your car needs.
How to Buy a Classic Pontiac
Whether you want to buy a classic Pontiac for yourself or as a gift, here are some tips on buying one for a great value.