Finding Boost Leaks

TM t44tq at
Thu Aug 1 20:09:58 EDT 2002

Hey, welcome to the list!

The bypass valve is also a weak point in Audis, so nothing new there.


-----Original Message-----
From: quattro-admin at [mailto:quattro-admin at] On
Behalf Of rocketscienceracing at
Sent: Thursday, August 01, 2002 6:37 PM
To: quattro at; GMBCHEF at
Subject: Re: Finding Boost Leaks

What we did in the Talon/Eclipse world was make a gadget
out of PVC pipe and an airline fitting. You then removed
the airbox and placed it over the air inlet hose to the
turbo, sealed it with rubber plumbing fitting and a
couple of hose clamps and pressurized it to whatever
pressure you wanted to run the turbo at, say 13 PSI for example. Without
the engine running it was easy to find the leaks by sound and feel. It
is also good for identifying at what pressure your bypass valve will
start leaking at (a weak spot on the Talons).

Home Depot has everything you need. Go to the plumbing department and
buy a PVC end cap of the right diameter, an air line fitting (the end
that would go on an air tool), drill the cap and put the fitting in with
a little RTV around it so it doesn't leak. Also buy a rubber plumbing
coupler and a couple of hose clamps in the appropriate sizes.

You do need to have a compressor, of course, but then
you're not a real gearhead if you don't (just kidding :-)


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