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PostPosted: Mon Jan 10, 2011 3:54 pm 
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Joined: Mon Jan 10, 2011 9:29 am
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Year and Trim: 2003 SSEI
I have searched through the forums and could not find a definite answer to this question. If there is already a forum on this topic I apologize in advance.

I have a 2003 Bonneville SSEi. We recently noticed a strong exhaust smell in the cabin compartment when the car was idling. When are driving we do not smell it. Just this morning I heard a loud ticking noise coming from the engine when I started it to let it warm up. I have no idea what is causing this symptoms. From what I have read on other forums I wonder if it could be the exhaust manifold gasket. Any assistance is greatly appreciated!


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PostPosted: Mon Jan 10, 2011 4:45 pm 
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Location: Hillsboro, Oregon
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Most likely the flex joint. The gaskets are a multi layer as and usually are not a problem. Has there been any exhaust work lately?


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PostPosted: Mon Jan 10, 2011 5:45 pm 
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No. I have never had any exhaust work done on the car.


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PostPosted: Mon Jan 10, 2011 6:26 pm 
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Location: Oregon WCBF'04, '05, '06, '07, '08, '09, '10, '11 Survivor
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95 SLE (SC)
97 Buick LeSabre
Check that flex joint between the rear manifold and downpipe. I agree that's your most likely leak.

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PostPosted: Tue Jan 11, 2011 11:30 am 
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Year and Trim: 2003 SSEI
Thanks for the tip. I will check it out. Would that also account for the ticking noise?


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PostPosted: Tue Jan 11, 2011 11:35 am 
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Location: Oregon WCBF'04, '05, '06, '07, '08, '09, '10, '11 Survivor
Year and Trim: .
93 SSEi
95 SLE (SC)
97 Buick LeSabre
Yes, and it's probably the most likely (but not really common) exhaust leak location. We HAVE seen the Series 2 cast manifolds crack and break though, so get a mirror and a flashlight and inspect well.

For the donut gasket in the flex joint, start with a cold motor. Start it and stick your hand back there feeling for it. Make sure your AC is off so the fans won't run and fool you.

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PostPosted: Fri Feb 18, 2011 10:02 pm 
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Year and Trim: 2003 ssei
I have the same problem. I just want to confirm that the gasket is a donut and is there a internet source for them? Thank you, Marko :bwoohoo:


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