Skip the auto shop - Our mechanics make house calls

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 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!
  • Home
  • Questions
  • 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: Car Won't Start went

Hello, thanks for writing in about your Ford Explorer. You would know if the alternator was at fault if it died while you were driving it and then would not crank. I would suggest replacing the battery and then have...

Q: Why does my 2005 Ford Mustang make a rattling and knocking noise

Hello. Most of the time this is caused by an issue with the timing chain or chain tensioners. The front of the engine would need to be disassembled in order to locate where the noise is coming from. Most of...

Q: My car seems to be having one huge glitch after the door was slammed extremely hard

Hi there. You should look at the door latch and the latch striker to see if there is anything visually wrong with the latch contacts with the plastic covers. Then inspect the striker to see if it is damaged or...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...