[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

Re: Vacuum Leak Detection

I made a leak finder out of a 3+ inch ABS rubber end cap and a tire valve
for about $7. Goes over the hose coming out of the airbox. Pressurize to
20psi - back off any hose clamp about 1/4 turn and it will begin to leak.
Real easy to find a leak.

mike miller
91 200q

-----Original Message-----
From: Dave Conner <conner@cfm.ohio-state.edu>
To: quattro@coimbra.ans.net <quattro@coimbra.ans.net>
Date: Wednesday, June 10, 1998 1:44 PM
Subject: Vacuum Leak Detection

>Who said vacuum leaks can be detected by wafting propane/butane around the
>engine and hoses until the engine revs higher...indicating the gas has been
>sucked in at the vacuum leak?
>I believe my "new" 91 200q has vacuum leak troubles.  So I tried the
>propane trick and got nowhere.
>The engine will run with the oil filler cap removed so I even directed the
>propane into the oil filler hole and the engine rpm did not change.  I
>spent ten minutes directing propane at every suspect hose with no vacuum
>leak detected.
>Am I doing something wrong?
>Are there other tricks I should I, or do I just need to inspect/replace
>every suspect item one by one?
>Dave Conner
>Columbus, OH