Oh ok.

That kinda answers my question.

I thought there was a check valve of some kind on a compression
tester, so it would hold  the "best" reading.

On 11/16/07, Mike Collum <collum@verizon.net> wrote:
> Neil,
>
> I once had a cracked head which was leaking combustion gasses into the
> coolant.  When doing a compression test, only the cylinder with the
> cracked head wouldn't hold pressure on the gauge.
>
> Mike
>
>
>
> neil N wrote:
> > Hi all.
> >
> > I bought a compression tester and tried it on my parts van 1.9 WBX
> > engine. On two of the cylinders, the gauge would drop while still
> > threaded in sparkplug hole.
> >
> > I was doing this w/o remote starter.
> >
> > The gauge should hold its' reading right? i.e. once it's pumped up, it
> > should stay there correct?
> >
> > It was threaded properly, and adaptor to hose was threaded properly too.
> >
> > Apologies for such and elementary question!
> >
> > Neil.
> >
> >
> > --
> > Neil Nicholson. 1981 Air Cooled Westfalia -
> > "Jaco"  (Bustorius)
> >
> > http://web.mac.com/tubaneil
> >
>

--
Neil Nicholson. 1981 Air Cooled Westfalia -
"Jaco"  (Bustorius)

http://web.mac.com/tubaneil