Date: Thu, 13 Sep 2007 17:56:18 +0000
Reply-To: rubatoguy@COMCAST.NET
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Todd Last <rubatoguy@COMCAST.NET>
Subject: Re: How do you check compression?
Take a look hither
http://www.carcraft.com/techarticles/116_0406_cylinder_leakdown_tester/index.html
or yon
http://www.type2.com/library/engineg/leaktst.htm
http://www.geocities.com/dsmgrrrl/FAQs/leakdown.htm
http://www.aa1car.com/library/leakdown.htm
-------------- Original message ----------------------
From: "Eastman, Cecil @ ELM" <Eastman.C@ATWOODMOBILE.COM>
> What's a "leak-down test"?
>
> Cecil
> '85 Westy Wolfy "Der BrotKasten"
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Michael Elliott
> Sent: Thursday, September 13, 2007 1:22 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: How do you check compression?
>
> Engine warmed-up, cold, doesn't matter?
>
> Counting number of strokes -- is that the number of wuh-wuh-wuh sounds the
> starter makes?
>
> --
> 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 9/12/2007 8:29 PM Dennis Haynes wrote:
>
> > Some more variables. Crank until gauge stops rising. You can hear the
> > change. Count the number of strokes. Should be 4-5. The design of the
> > gauge can affect this. The hose length and placement of the valve will
> > make a difference. Of course you will also want to do a leak down test. On
> > older engines it is common for the front two cylinders (1-3), to show
> > lower compression then the rear and still check good with the leak down.
> > This can indicate worn cam lobes.
> >
> > Dennis
> >
> > -----Original Message-----
> > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> > David Kao
> > Sent: Wednesday, September 12, 2007 10:31 PM
> > To: vanagon@GERRY.VANAGON.COM
> > Subject: How do you check compression?
> >
> > I was told by a mechanic that when checking compression for a 4 cylinder
> > engine I should get 4 strokes, no more than that, and get the reading.
> > But Bentley Manual says to continue to crank until getting the highest
> > reading. So how do you folks do it? How many strokes on the average do
> > you crank to get the highest reading?
> >
> > David
> >
> >
> >
> >
> >
> > __________________________________________________________________________
> > __________
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> >
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