re
Intake assembly before the air filter canister that traps dust/firt. Clear
plastic, that is slanted so the dirt tends to settle in the deeper end.
snaps off with the metal retainer so it can be emptied.

It's only on syncro vans.
Though one can be fitted to a 2WD 2.1 waterboxer vanagon easily.

it's a 'swirl pre-filter' ...by swirling the air with internal fins ...it
causes large particles, pebbles, sand, etc. to be swirled outwards so they
fall out of the air entering the main air box....and collect in a clear
plastic bowl that you empty once in a while.
It keeps that junk from even getting to the main paper air filter element at
all.

I have one extra one I might sell.
they're a slick device.

scott
www.turbovans.com

----- Original Message -----
From: "Bob Stevens" <mtbiker62@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Saturday, May 21, 2011 10:17 AM
Subject: Re: Van idle over winter/Dirt Trap

> >
>>
>> What is the "dirt trap"?  I know what the air filter and air filter
>> assembly are, but have never heard of the "dirt trap" (on this or any
>> other
>> vehicle).  It sounds like something that should definitely be cleaned on
>> occasion.  I do not find it mentioned in the owner's book, either.
>>
>> Intake assembly before the air filter canister that traps dust/firt.
>> Clear
> plastic, that is slanted so the dirt tends to settle in the deeper end.
> snaps off with the metal retainer so it can be emptied.
>
> bob