 What do these air flaps do?, And how important are they? |
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| JeffBowlsby |
 Dec 15 2005, 01:51 PM
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914 Wiring Harnesses  Group: Members Posts: 8,548 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None 
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I bet most 914s don’t have these flaps anymore. These hinged flaps in the diagram are called ‘engine fan flaps’ or ‘non-return flaps’ in the parts manual. They close off the supply air duct path from the engine fan to the heat exchangers when the engine is off by gravity. They open up with the force of supply air to the heat exchangers when the engine is spinning, to circulate air through the HEs into the cabin, as assisted by the electric blower fan in the engine bay.
So the only thing I can figure is that after the car is hot and the engine is shut off, the flaps close to prevent hot air from entering the supply air fan plenum…but I can’t figure out why that’s important. Any ideas? Attached image(s) 
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Posts in this topic
Jeff Bowlsby What do these air flaps do? Dec 15 2005, 01:51 PM
bd1308 they're real flimsy tin pieces....mine actuall... Dec 15 2005, 01:54 PM Demick I believe the purpose of those flaps is so that wh... Dec 15 2005, 02:01 PM Bleyseng http://www.914world.com/bbs2/h... Dec 15 2005, 04:00 PM SLITS ... Dec 15 2005, 04:30 PM McMark Nice description Demick. htt... Dec 15 2005, 04:34 PM bd1308 i'll just make some from aluminum sheet metal.... Dec 15 2005, 06:16 PM ClayPerrine Actually... its all a gag being played on everyone... Dec 15 2005, 06:21 PM 9146986 Dec 16 2005, 01:34 AM joeav8tor I dont think the heat has anything to do with the ... Dec 16 2005, 07:08 AM DJsRepS Finally bingo Joeav8tor. They are hooked by cable... Dec 16 2005, 07:32 AM Jeff Bowlsby Joe/DJ...
We are talking about the lower flaps...... Dec 16 2005, 08:34 AM Bleyseng http://www.914world.com/bbs... Dec 16 2005, 08:54 AM double-a last time i was under there i noticed the starboar... Dec 16 2005, 09:31 AM joeav8tor sorry about that, I saw the beginning diagram, I s... Dec 16 2005, 12:37 PM
VWnDRAG Those little post-fan, gravity close, tin flaps ri... Dec 16 2005, 05:47 PM  |
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