Why would fumes come through my vents?

Asked by Feb 02, 2015 at 08:00 AM about the 2007 Chevrolet HHR LS

Question type: Maintenance & Repair

When idle it comes
through have to put
vents on
recurculate.when car
moves its not as bad.

2 Answers

275,315

Does it smell like coolant, oil, or something else?

2 of 2 people found this helpful.
20

I have the same issue with my 2010 LS. Most likely, the issue is that u have an exhaust leak in your exhaust system. Your exhaust system is supposed to be a closed system from the engine to the tail pipe. If there is an exhaust manifold leak, then the fumes are filling the engine compartment and the "outside air" option will allow the fumes into the passenger compartment (thus, the smell). Furthermore, you wouldn't notice it as much while the vehicle is moving because the air passing under the vehicle is sucking the fumes FROM the engine compartment.

2 of 2 people found this helpful.

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