Geza, what I think people are telling you is that the air has to go
somewhere even after it pushes the piston down.  Before I put a new long
block in the exhaust gases (leaking heads) would bubble up through the
coolant in the overflow tank.

John
----- Original Message -----
From: "Geza Polony" <gezapolony@SBCGLOBAL.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, December 31, 2006 7:54 PM
Subject: Re: Leak Down Testing

> John,
>
> What I'm reading from this person's description is basically that you pump
> air into the spark plug holes and listen where it comes out--exhaust,
> intake, or coolant. Why do you need even to measure the pressure? Are
> there
> some specs to measure against, eg., each cylinder should hold x amount of
> pressure for x seconds? If so, what are the specs? I've never done one of
> these tests before.
>
> Thanks,
>
>
> Geza
>