My compression tester has just that--a valve (the core is just like in your
tire) to hold the max compression reading until I release it.

Raymond

On 11/16/07, neil N <musomuso@gmail.com> wrote:
>
> 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
>