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Hissing/Clicking Sound from AC front vents? Is this how a 240 sounds? 200 1993

posted by  BrickOCheese on  Wed Feb 12 08:15 CST 2003
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This is not a new problem. Been there since I bought the car and for the most part she runs great.

But, the hissing/clicking noise from the vents, most notable under load or at 70+ mph, has always seemed more than "normal". Though since I have never been in a new/perfect 240, I have no idea what "normal" is. The clicking component of the "hiss" does not seemed directly correlated to RPM, rather the volume of it all correlates to load/speed. In town, hardly noticable sometimes.

I have tried to figure out what it is. Maybe valves, a tiny hole in my exhaust somewhere (never looked, just pondering), who knows.

So my question? Is this a "normal" 240 sound? If so, what is it? Why does it seem to "trasmit" through the vents? Was is less noticable in a "new" 240?

Thanks all. I want to stop thinking about it and I hate always cranking the radio! :)

-

Pete
1993/244/152k






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