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PostPosted: Sat Mar 16, 2013 11:45 am 
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Joined: Mon Apr 09, 2012 3:35 pm
Posts: 1
Year and Trim: 2003 Pontiac Bonneville SE
Hey whats up everybody.

My 2003 Bonnie is having trouble, I started it up this morning and I saw some smoke. Popped the hood and at first I saw something wet on the header in the front, so i figured it was just burning off whatever it was. After it had evaporated, it was still smoking. It looked like it was coming from under the valve cover, plausible for something to get on the header.

I looked underneath the car and nothing is leaking. My wife also said that it has had trouble accelerating at times. I had the radiator drained, flushed and refilled a bit ago, thats when the problems started happening. Also no smoke coming from the exhaust.

The last thing i can think of..........one of the spark plug wires looks caked in oil.

Any ideas?

any help is greatly appreciated.


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PostPosted: Sat Mar 16, 2013 1:04 pm 
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Resident Gearhead
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Joined: Mon May 19, 2008 10:30 pm
Posts: 8762
Location: Grand Rapids, Michigan
Year and Trim: 2014 Cadillac XTS Vsport.
Mostly likely cause for the smoke is a leaking valve cover gasket. That would not cause performance problems. We'd need more information in order help with that.

Just to be sure that you are aware of a common problem, you may want to familiarize yourself with these articles in techinfo.

http://www.pontiacbonnevilleclub.com/forum/engine/topic1061.html
http://www.pontiacbonnevilleclub.com/forum/engine/topic3591.html

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