360 Exhaust Smell

I detect a slight exhaust smell from my recently purchased 2002 Spider. It's most noticeable with the top down and windows up, but it's also noticeable with the windows down. A search doesn't indicate that this is a common 360 problem. Has anyone else encountered this? How was it fixed?

The smell is definitely exhaust, and not fuel. I have stock headers and cats, but a Tubi muffler. I don't hear the ticking of an exhaust leak. The flanges between the pipes and muffler are very rusted.

Since the smell is most noticeable with the top down and windows up, can I assume that low pressure is drawing fumes from the engine inspection plate?

 

You may be right, but wouldn't a cracked header cause a ticking, exhaust leak sound?

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That's good to know. How were you or your mechanic able to diagnose the problem without removing the header? Did you note exhaust fumes entering the cockpit?

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Gentlemen, please get on topic. Yes, it may be possible for a damaged header to cause an exhaust smell, though this doesn't seem to be the case with JB-Slow.

I'm particularly interested if anyone has experienced exhaust fumes with a perfectly operating exhaust. Have compromised body gaskets resulted in fumes entering the cockpit with the top down? How about missing wind deflectors?

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