The Auxilary Air Valve functions to introduce additional air to the fuel
mixture when the engine from a cold start.  I like to compare it to the
operation of an automatic choke except instead of being closed when cold, it
is open on the air valve.  During the warmup of the engine, the air valve
closes as 12 volts is applied to the bi-metal in the valve.  Ambient
temperatures also play as a factor in warm weather, causing the bi-metal to
partially or fully close the valve in hot weather.  Essentially, the Aux Air
Valve is a necessary component for starting in cold to mild weather.

Gary Malick from the Type 2 List pmailed saying he uses one from a mid 80s
Jetta on his Bus, but there are two different ones, so I've replied back to
him with the question of which one he's using.  Could be an adequate
substitute for the 80-85 Vanagon, but further research is needed, such as
testing one on my Westy (always the guinea pig, me).

 Bosch 0280 140 107 / VW 049 133 453 (Jetta Auto Trans) (Some Man Trans
early 80s)
or
Bosch 0280 140 164 / VW 049 133 453 E (Jetta Man Trans)
--
Jim Thompson
84 Westfalia 2.1 "Ole Putt"
73 K Ghia Coupe "Denise"
72 411 Station Wagon "Pug"
oldvolkshome@gmail.com
http://www.oldvolkshome.com
**********************************
On 9/7/06, don spence <dkspence@telus.net> wrote:
>
> What is it's function and where is it located?
>
> TIA
> On 7-Sep-06, at 1:57 PM, Automatic digest processor wrote:
>
> >  Aux Air Valve Officially Obsolete
> >