[200q20v] bypass valve to intake manifold line

Phil Rose pjrose at frontiernet.net
Fri Aug 11 22:57:51 EDT 2000

At 6:27 PM -0400 8/11/00, Chris Covington wrote:
>What size is this line (length and diameter) and what kind of replacement
>line have people used?  How did you keep it attached to the valve and the
>I'm going to replace mine this weekend, along with rear brakes, air filter
>and some hoses (well my old roommate is helping too).
>thanks for the info, as always,
>'91 2cq
The fabric-covered vac hose should be available for about $2/ft (p/n 020
353 017---3.5 mm) if bought at non-dealer supply. I think the Audi dealers
get about $7/ft.

I believe you need a minimum of 3 ft to replace the old one exactly. But I
used ordinary 5/32 vac-line hose, and with about 6 ft.  I could  route the
hose over to the passenger-side fender and run it behind the fuel filter
and airbox. That path avoids the exhaust manifold heat that cooked your old
hose. An ordinary (very small) hose-clamp will keep it fixed to the nipple
from the intake manifold. But it's a problem figuring out how to clamp the
new hose to the bypass valve inlet (its pretty inaccessible). For a
make-shift "clamp", I used some 12 ga copper wire (an offcut from house
wiring). I stripped a couple of inches of the wire and then (with the hose
off the valve) I wrapped a couple of turns of the wire very snuggly (not
too tight) around the vac hose--about 1/4" from the end. Then I lubricated
the hose end (spit works well) and slid it over the valve inlet. It's
pretty darned snug and has been secure for about 20K miles.

Phil R.

Phil Rose				Rochester, NY
'91 200q				mailto:pjrose at frontiernet.net

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