3A eng. Control box intake air pre-air filter

[Huw Powell]

> There is a control box attached to the air filter housing. It controls warm
> air from exhaust manifold and cooler air from front of the car. Since I live
> in a tropical environment, do I need heated air to start the engine.

Sure, but it doesn't matter as much at 90 F as it does at 0 F.

> Can I
> close the flap to block warm/hot air, without causing a problem. I don't
> think it is working properly anyway because when I look at the flapper, it
> is open to exhaust heated air on a 85F day, shuting off outside air. I would
> think it should be closed, always.

 From my investigation (or was it reading the Bentley?) that flap begins 
to change position around 100 F.

To answer your question, though, with ambient temps always "high" (say, 
over 60 F), removing that assembly will be unnoticeable.

In fact, most of the older (80's) cars have it "de facto" removed 
because the metal shroud that gathers air from the exhaust manifold 
rusted and fell off years ago.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/