Q: Somewhat over heating. White greyish smoke coming out of exhaust. No heat

asked by on

I recently ran into an issue temp gauge and heat not working. Temp gauge who bounce around more than normal and mt heat was vey good. I was driving to work the other dayband hear a loud pop. I stopped the car and check my hoses belt tires ect and everything looked fine. Still having problems i went a head and replaced the thermostat and water pump. Now im having an issue with the car trying to run hot but the thermostat will bring temp back down to half. But i have white/greyish smoke coming out of the exhaust and still no heat. When the car is in park and idling the temp runs fine with no heat. When i drive it the temp gauge with almost hot the "H" but them come right back down. Also once the car has warmed up the "smoke" im seeing pretty much goes away

My car has 142000 miles.
My car has an automatic transmission.

Hi there. From the description you have provided, leads me to believe, there may be air trapped in the cooling system. Bleeding the cooling system can be difficult. A cooling system flush could resolve this issue. The white-greyish smoke cold, may just be condensation in the exhaust, being the smoke goes away engine warm. Continued driving with a low cooling system, could result in catastrophic and expensive repairs. I recommend having your vehicle’s erratic temperature gauge and white-greyish exhaust smoke be diagnosed and repaired by a certified technician, such as one from YourMechanic.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Somewhat over heating. White greyish smoke coming out of exhaust. No heat

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: My Ford Explorer SERVICE RSC NOW light is on,what should I do?

RSC stands for Roll Stability Control. It is a form of stability control. The RSC works in conjunction with the anti-lock brake system to help regain control of the vehicle if it goes into a spin or slide. The system...

Q: master cylinder is bad, but does it make a noise going down the road. if so what kind. mine is intermittent

Hello, thank you for writing in. The master cylinder may make some noises, however it is rather unlikely that you are going to hear these fluid sounding noises over the engine noise. Start by adding the differential fluid and take...

Q: Motor Locked up

Check to see if the starter motor pinion gear is jammed in the ring gear on the flex plate. On the off chance that somehow the transmission is the issue, you can also try disconnecting the torque converter from the...

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.