Date: Thu, 13 Sep 2007 13:45:18 -0500
Reply-To: Larry Alofs <lalofs@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Larry Alofs <lalofs@GMAIL.COM>
Subject: Re: How do you check compression?
In-Reply-To: <46E971CC.5040706@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
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> 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] 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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