I was out warming up my car today and I decided to turn the heater on. After I turned it on I noticed there was exhaust comming through my heater. My best guess was that it is comming from my engine because I have a leak comming from my exhaust manifold. Am I right or is it something else? Thanks in advance.

-Neal

 

Exhaust, or a smoky cloud? My friends' vents blew a cloud of whoknowswhat when his A/C went out. It was the system being discharged.

The heater blows air that comes from the vents under the wipers. Exhaust leaks might be noticeable by odor through the heater air, but not in significant volume.

Dave

 

It was actually a bit smoky and it definetly did smell like exhaust

 

If the seal at the top-rear of the engine compartment was missing or badly damaged, a lot of engine fumes could get into the heater intake.