White smoke - Chevy Impala Forums
Mechanical and Electrical Problems Having problems with your Chevy Impala? Discuss it here.

User Tag List

  • 1 Post By 12 lt
  • 2 Post By 2014LTDLTZ
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 07-06-2019 Thread Starter
Junior Member
sinjin's Avatar
Join Date: Jun 2015
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
White smoke

This is about a 2007 Impala with a 3.9L and 148,000 miles.

I was driving down the highway and suddenly noticed the "service traction control" message came on and the check engine light was blinking. I had driven over 500 miles for the day at this point. I looked in the rear view mirror and saw white smoke coming out the back. The temp gauge indicated the temp was right at normal (i.e. needle was at half way).

I pulled over and popped the hood. I didn't see anything wrong with the radiator hoses. I then saw the white smoke coming out of both exhausts. I tried to start the car and it turns over, but will not fire.

Get it towed and it is dark. The tow truck driver and I see no evidence of a blown head gasket.

1) No evidence of coolant anywhere outside the engine or on ground.

2) No sign of coolant on dipstick.

3) i do not see any oil in the overflow reservoir.

I did not remove the radiator cap yet. Tow truck guy said it seems odd the temp gauge indicated there was no overheating going on although it could be wrong. One thought is perhaps there is a coil pack problem or a fuel pump issue.

I am sick with worry about this and would appreciate amy feedback.

The car will turn over but not start. Tow truck guy said this does not sound like a coil/ignition problem.
sinjin is offline  
Sponsored Links
post #2 of (permalink) Old 07-07-2019
Senior Member
12 lt's Avatar
Join Date: Feb 2017
Posts: 1,057
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 240 Post(s)
Thanks: 73
Thanked 85 Times in 80 Posts
White smoke could be worn rings. Should still start though.

First things first, I would check codes if it were mine. Most often ignition issues will throw a code. That being said it is easy enough to rule out the ignition system by testing for spark. If spark is there then check fuel pressure.

My 6 year constantly asks why. What adults can learn from 5 and 6 year olds, to listen with your ears and mind open. Hard to learn when you don't listen ......
12 lt is offline  
post #3 of (permalink) Old 07-07-2019
Senior Member
Bill58's Avatar
Join Date: Apr 2017
Location: Frederick, MD
Posts: 216
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 51 Post(s)
Thanks: 3
Thanked 25 Times in 25 Posts
Won't know much until you check coolant level. Did the white smoke have a smell (oil or coolant)?
Bill58 is offline  
Sponsored Links
post #4 of (permalink) Old 07-09-2019
Senior Member
2014LTDLTZ's Avatar
Join Date: Aug 2017
Posts: 164
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Thanks: 2
Thanked 9 Times in 9 Posts
White smoke is usually indicative of coolant leaking into a combustion chamber. Blue smoke is usually indicative of oil being burned. In the absence of anything else, at this point I lean towards a coolant issue. It doesn't take much coolant in the combustion chamber to produce a white-colored exhaust. Sounds to me like the makings of a head gasket issue.

I'd suggest pulling the spark plugs one at a time and check the electrode for whitish and/or crystalline type of deposits. The plugs from the one or two cylinders burning coolant will look different. Depending upon how much coolant is being sucked in, the plug could even be wet when you take it out.

Best of luck with it.
plano-doug and sheila like this.
2014LTDLTZ is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Chevy Impala Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome