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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