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Posted

On my F that hose is the same size as the other hose that hooks to the heater box. It isn't hooked to anything, it just vents air through the heat muff on the muffler to keep it cool when the cabin heat is not on. Mine is mounted to a stud on the footwell.

Posted

As Mike said it is to vent heater air out of the cowl when the heater is not on. As shown, it is pointed toward the cowl flap opening. Without it, you pump hot air up, typically toward the voltage regulator....not good.

Posted

On our E it's a smaller hose from what it looks like, and its connected to the left side baffling behind the #4 cylinder. I think it pressurizies the air box to provide "flow" for the cabin heater. Otherwise it's just hot air moving whatever way it wants off the exhaust, with out positive pressure to force it in the cabin.

Posted

The hose ports hot air out when the heater divertor valve is closed. (When I bought my E I found that someone had installed a plug in this tube. Bad idea. I would up replacing the exhaust system. The plane had been based in upstate NY, I suppose someone thought the plug would help in the winter. As I said, bad idea.)

 

Bill, my E has a longer hose, I think, getting the air nearer the cowl opening. I don't find a pic that shows the bottom end.

post-8913-0-71780300-1371903459_thumb.jp

Posted

Thanks to all who replied.. That's what I thought it might be after looking at it. 

Found a big crack in the muffler so time to get a new one which will also fix my lack of heat issue last winter.

BILL

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