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Date:         Fri, 28 Sep 2007 12:07:17 -0700
Reply-To:     "Mike \"Rocket J Squirrel\" Elliott" <camping.elliott@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         "Mike \"Rocket J Squirrel\" Elliott" <camping.elliott@GMAIL.COM>
Subject:      Re: Plugging leaks in intake manifold
Comments: To: Jake Beaulieu <jbeaulie@ND.EDU>
In-Reply-To:  <vanagon%2007092814495562@GERRY.VANAGON.COM>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Perfect-o! Thanks for the Dummy's Guide, it's just my speed!

Mike "Rocket J Squirrel" Elliott 71 Type 2: the Wonderbus 84 Westfalia: Mellow Yellow ("The Electrical Banana") 74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano KG6RCR

On 9/28/2007 11:40 AM Jake Beaulieu wrote:

>>> Mike, >>> >>> I believe a good test of the air intake system is to measure the > manifold vacuum you are generating. I combed the archives on this topic a > while back it seems that anything over 18 in Hg is pretty good. Below 15 > or so and you should really go searching for a vacuum leak. >> Hi Jake, that sounds like a nice, direct test. How might this be done? > > > What you want to do is to measure the vacuum being generated at the air > plenum while the motor is running. All you need is an inexpensive vaccum > gauge. I picked one up from a local industrial hose supply store for > $10. It should have a range of 0-30 in Hg. The highest vacuum I saw > reported in the archives was 27 in Hg (Stan Wilder on an AC van), but that > is rare. Next, you need to come up with a way to expose the gauge to the > manifold vacuum. I did this by inserting a plastic T in the vacuum line > that comes out of the passengers side of the air plenum and goes to the > fuel pressure regulator. I then used a 1 inch piece of vacuum hose to > connect the gague to the unused port on the T fitting. I own an air > cooled van and the vacuum line configuration may be different than on your > water cooled van, but the principle is the same. I hope that helps. > Jake >


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