Hi Robert,

I can say for certain that the ones used on aircooled vans from 74-85
are definitely interchangeable. The other marques and applications I am
less certain about.

The general idea is that they have a valve that is controlled by a
bimetallic spring heated by a 12V coil. It is supposed to start off cold
fully closed and gradually come fully open in 4 minutes. It's very
simple to test them in this manner; if they pass then they are
acceptable for use in an aircooled T4 or WBX engine.

Happy Trails,

Greg Potts
1973/74/79 Westfakia "Bob the Tomato"
1987 Wolfsburg Weekender Hardtop
www.busesofthecorn.com
www.pottsfamily.ca

Robert Keezer wrote:
> They are on rabbit, cabriolet, jetta, Golf. Audi 500 (like 83).
> What I really want to know , does the part number matter?
> they look the same, do the same thing, does it matter what the part number says?
>
> --- On Sun, 7/5/09, Greg Potts <greg@pottsfamily.ca> wrote:
>
>> From: Greg Potts <greg@pottsfamily.ca>
>> Subject: Re: 1.9 aux air valve
>> To: "Robert Keezer" <warmerwagen@YAHOO.COM>
>> Cc: vanagon@GERRY.VANAGON.COM
>> Date: Sunday, July 5, 2009, 6:03 PM
>> Hi Robert,
>>
>> Same part. It was also used on the baywindow buses from
>> 1974 (CA Auto only, all others that year were carbureted) to
>> 1979.
>>
>> There is also one on my wife's 85 cabriolet; that one has
>> CIS fuel injection. I am pretty sure it was also used on
>> other Bosch-FI marques in the 70s and 80s, including Volvo
>> and others.
>>
>> Happy Trails,
>>
>> Greg Potts
>> 1973/74/79 Westfakia "Bob the Tomato"
>> 1987 Wolfsburg Weekender Hardtop
>> www.busesofthecorn.com
>> www.pottsfamily.ca
>>
>>
>> Robert Keezer wrote:
>>> I have a question exclusively for someone who really
>> knows about these auxilliary air valves found on 1.9
>> enegines 83-85, and on Air-cooled from 80-83.
>>> Are they all the same? The ones for Volkswagen all
>> look the same, and so are some for Mercedes, Audi, Porsche
>> etc.
>>> All have the firs 7 digits in common: 0 280 140 101,
>> 141, etc.
>>> I found one on a air-cooled and the number shows up as
>> Audi, yet the engine runs fine.
>>> Experts?
>>>
>>> Robert
>>> 1982 Westfalia
>>>
>>
>> --
>

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