Date: Thu, 13 Sep 2007 12:26:13 -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: How do you check compression?
In-Reply-To: <96c89c360709131145n7c5a51feh5f7b4ac5ceba544e@mail.gmail.com>
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So . . . let the engine idle a minute? 5 minutes?
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 9/13/2007 11:45 AM Larry Alofs wrote:
> Warm oil will let it crank a little faster, which might increase your
> readings slightly. But you don't want to remove the plugs when the
> engine is very hot because you may damage the threads in the aluminum head.
> Let it crank until the reading stops going up.
>
> Larry A.
>
>
> On 9/13/07, *Michael Elliott* <camping.elliott@gmail.com
> <mailto:camping.elliott@gmail.com>> wrote:
>
> 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
> <mailto:vanagon@gerry.vanagon.com>] On Behalf Of
> > David Kao
> > Sent: Wednesday, September 12, 2007 10:31 PM
> > To: vanagon@GERRY.VANAGON.COM <mailto: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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