Exhause smell in car

2003 OLDSMOBILE ALERO

145,600 MILES • 4 CYL • 2WD • AUTOMATIC

SIXSON63

MEMBER
2 POSTS

I have a 2003 Alero with 145K miles. About 25K miles ago I started smelling exhaust in the car when stopped at a light or stop sign. I don't notice any performance problems, fuel mileage is excellent, and I don't hear any excessive exhaust noise when accelerating. Any ideas?

Mar 12, 2011 at 4:18 PM

JACOBANDNICKOLAS

✓ASE Certified Mechanic
110,194 POSTS

If you smell it in the car, check for exhaust manifold leaks. Also, check for leaks after the muffler if there has been no change in sound.

Apr 7, 2011 at 1:38 PM

SIXSON63

MEMBER
2 POSTS

Thanks. There has been no change in sound, the manifold was my first guess as well, but again, no change in sound. When I put the ventilation on recirculate the exhaust smell goes away. Anything else I should look at?

Apr 7, 2011 at 8:27 PM

JACOBANDNICKOLAS

✓ASE Certified Mechanic
110,194 POSTS

Keep in mind, a manifold leak will most likely make a slight ticking sound. Also, check to make sure there are no leaks near the Y-pipe and the EGR. We own an expedition that was doing the same thing. My wife drives it. She smelled exhaust just as you described, but she never told me she heard a slight ticking sound in the AM, It was a cracked manifold.

Let me know what you find.

Apr 8, 2011 at 2:19 AM

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