Skip to content
Trust My Mechanic
Trust My Mechanic

Your Free Car Repair Advice and Auto Repair Help

  • Home
  • About Me
  • Contact Me
  • A/C and Heater
  • Auto Repair Questions
  • Battery – Alternator
  • Brakes
  • Check Engine Lights
  • Coolant Leak
  • Exterior Care
  • Front End
  • Head Gasket Repair
  • Auto Insurance
  • Auto Loans
Trust My Mechanic

Your Free Car Repair Advice and Auto Repair Help

White Smoke Under Hood

Austin Davis, October 22, 2007September 30, 2014

Hi Austin,

Thanks for being a great help for so many of us here. I also have a question which I hope would be addressed by you.
I am living in Edison, NJ. Last Tuesday it rained pretty heavily here and I had to drive my car in that rain. The next morning I drove my car to work but I could smell a burning odor. I could see even white fumes coming out from under the hood. At the same time the Battery Indicator light came on in the instrument cluster. I pulled over my car in a parking lot and cut the ignition to check the engine.

Engine oil was good, transmission oil was also upto the level. When I restarted the car, the fumes were gone and the battery indicator also went off. This has happened quite a few times after that incident. I have a feeling that the alternator is not working properly and needs repairs.

And yeah the smoke was coming from the right side of the hood if you consider from a position sitting inside of the car in the driver’s seat. I have not taken the car to mechanics yet, just waiting for an opinion from you.

Thanks,
Abhinav

 

Howdy there Abhinav, thanks for your email.

You did not mention anything about a dead battery or having to jump start the engine. The red battery light coming on the dash COULD be caused by a problem with the alternator, or you could have a bad cell inside the battery.

If you are not experiencing a dead battery complaint (due to a bad battery or an alternator that is not charging altogether) , you probably have an internal alternator problem with something called a diode. The diode can fail and cause the red light to come on the dash although the alternator is still producing the electricity to keep the battery recharged. You can have your alternator rebuilt by a starter and alternator shop in your area and save yourself some money.

The smoke, hummmm, if it is white in color it is probably due to coolant/antifreeze leaking on the hot engine and you are seeing steam coming from under the hood. Or you could have a small engine oil leak that is leaking on the engine and producing the white smoke. I would double check the under hood fluids and the coolant level first. The smoke and the red dash warning light could be related or it could be coincidental.

You will probably need to have a mechanic check your alternator and “load test” the battery to find the problem with the red dash light, and if you are low on coolant and can not find the leak yourself you will need to get a cooling system pressure test done by the mechanic as well.

This is a cheap and quick test to locate coolant leaks. Both the smoke and the red light would be a concern for me, so do not delay your mechanic visit.

Keep me posted as to what you find out will ya?

Blessings,

Austin Davis

Related Posts:

  • What Your Exhaust Smoke Is Trying To Tell You?
  • How to Fix White Smoke from a Diesel Engine: Common…
  • 5 Common Symptoms of Car Engine Overheating
  • Why is my diesel blowing white smoke
  • What are the Signs of a Bad Alternator? A…
Auto Repair Questions

Post navigation

Previous post
Next post
  • (no title)
  • Front and rear Brake Pads and Rotors
  • How do disc brakes work in cars and light vehicles
  • How do hydraulic brakes in cars and light vehicles work 3D animation
  • Look at How Far my Project Car has Come in a Year
  • 7 Things You Shouldn’t Do In an Automatic Transmission Car
  • How to Change EVERY FLUID in your Car or Truck 
  • 10 Winter Car TIPS & TRICKS you NEED to Know
  • How Much Weight can you REMOVE from your Car?
  • What Happened to the LEMONS BMW?
  • What it Actually Takes to Race a $500 Car for 24 Hours!
  • How to Install Windshield Wiper Brakes
  • How to Replace a Hybrid Battery in a Prius
  • How To Install A Flex Fuel e85 Conversion Kit In Your Car
  • How To Fix A Leaking Rear Axle 
  • How to Install Windshield Wiper Brakes
  • How to Perfectly Maintain Your First Car
  • How To Make Your Car Last A Long Time – Simple Checks
  • 12 Things To Check Before Buying A Used Car
  • Priced for Perfection: The World’s Most Expensive Cars
  • How To Drive A Manual Transmission + Rev Match + Heel Toe Downshift
  • How to Buy a Car To Flip for a Profit 
  • How to Buy a Used Car Interior and Exterior Inspection
  • How to Inspect a Used Car for Purchase

©2025 Trust My Mechanic | WordPress Theme by SuperbThemes