Why is there white smoke coming out of my rear exhaust?

Asked by Aug 10, 2015 at 05:18 PM about the 1999 Chevrolet Corvette Convertible

Question type: Maintenance & Repair

I have  C5 LS1 The car started idling hard last night when I left work. I noticed an odd
order, not like gas, like acetone?  The engine never really smoothed out , but I was in
a residential neighborhood and did not get above 25mph. Within a couple of minutes
the engine light went on and shortly after that white smoke came out out of the rear
exhaust. When I turned the car off white smoke continued to slowly come out of the
rear exhaust, majority on the left side. Checked oil, looks clean and level is good.
Only use Chevron Supreme at the same station, I don't think I got a lesser, but any
thing is possible. The car is not driven hard, but regularly. 85,000 miles on her.
Thanks for your help.

5 Answers

44,735

Check the engine coolant level. Could be a cracked cylinder head, cracked block or a bad head gasket. I hope it is something else.....

1 out of 1 people think this is helpful.
90,985

Check the coolant level, usually white smoke out the exhaust is water in the combustion chamber, most common is a blown head gasket, but have also seen a cracked head do the same thing. A shop can perform a block check and that should confirm the trouble.

2 out of 2 people think this is helpful.

Thank you both so very much. I spent a few hours doing some research and came up with the same conclusion. I have learned that a cracked cylinder, or block, is bad. Keep your fingers crossed, and thanks again!!

One more question. I am assuming that the car should not be driven, and flat-bedded to a shop?

44,735

Don't drive it or you may do more damage.

Your Answer

Add photo

Related Questions

Corvette

Looking for a Used Corvette in your area?

CarGurus has 20,456 nationwide Corvette listings starting at $3,495.

ZIP:

Search Chevrolet Corvette Questions

Chevrolet Corvette Experts

#1 John Carson
John Carson
Reputation 2,190
#2 carGrrl
carGrrl
Reputation 1,370
#3 Vincent Parker
Vincent Parker
Reputation 1,320
View All

Related Models For Sale

Used Chevrolet Camaro
148 Great Deals out of 32,614 listings starting at $1,729
Used Ford Mustang
389 Great Deals out of 47,511 listings starting at $1,800
Used Porsche 911
81 Great Deals out of 4,643 listings starting at $11,992
Used Dodge Viper
5 Great Deals out of 434 listings starting at $24,995
Used Chevrolet Silverado 1500
1,752 Great Deals out of 170,135 listings starting at $1,800
Used BMW M3
38 Great Deals out of 1,687 listings starting at $4,544
Used Ford F-150
2,245 Great Deals out of 209,704 listings starting at $1,499
Used BMW 3 Series
960 Great Deals out of 33,579 listings starting at $1,000
Used Mercedes-Benz SL-Class
34 Great Deals out of 2,951 listings starting at $2,900

Used Cars For Sale

2017 Chevrolet Corvette For Sale
5 Great Deals out of 10,363 listings starting at $45,715
2016 Chevrolet Corvette For Sale
10 Great Deals out of 1,531 listings starting at $42,602
2015 Chevrolet Corvette For Sale
5 Great Deals out of 690 listings starting at $40,995
2014 Chevrolet Corvette For Sale
826 listings starting at $36,991
2013 Chevrolet Corvette For Sale
9 Great Deals out of 390 listings starting at $25,899