Re: [DMCForum] Re: tone L.O.C.

["Andrei Cular" <acular@xxxxxxxxxxxxxxx>]

On my engine with only 20k miles half the valves were fine 2 or 3 were
actually staying open a bit.

But if your gage dropped when you unscrewed it I wouldn't trust it to give
you the correct pressure.  The reason they put a check valve in is to
capture the max pressure and hold it.



Andrei





----- Original Message ----- 
From: "cruznmd" <racuti1@xxxxxxxxxxxx>
To: <DMCForum@xxxxxxxxxxxxxxx>
Sent: Monday, August 04, 2003 7:38 AM
Subject: [DMCForum] Re: tone L.O.C.


> I did not check the gap on -every- valve. I suppose I should. I never
> fussed with the valve clearances during head removal/installation
> though.
>
> The one I did check was satisfactory. I'll do the rest though.
>
> Also, my gauge dropped to zero as soon as I unscrewed it so it should
> be ok for a leak down tester.
>
> --- In DMCForum@xxxxxxxxxxxxxxx, "Andrei Cular" <acular@xxxx> wrote:
> > Did you ever check gap on your valves?  The low compression could
> be do to a
> > valve not seating 100%.
> >
> > Most compression gages have a check valve which makes them useless
> for a
> > leakdown tester.  I have one that came with two different hoses,
> one with a
> > valve for compression and the other with an air fitting for
> leakdown.
> >
> >
> >
> > Andrei
> >
> >
> >
> > ----- Original Message ----- 
> > From: "cruznmd" <racuti1@xxxx>
> > To: <DMCForum@xxxxxxxxxxxxxxx>
> > Sent: Monday, August 04, 2003 7:08 AM
> > Subject: [DMCForum] Re: tone L.O.C.
> >
> >
> > > Jim,
> > >
> > > Thanks for helping square me away on the oil pump issue. I was
> > > starting to get concerned.
> > >
> > > I did find the real numbers in the Volvo manual the I borrowed
> from
> > > Mike Cohee.
> > >
> > > 114-156 psi while HOT, and a cranking rpm of 250-300, throttle
> wide
> > > open.
> > >
> > > I believe that your compression gets better as things heat up and
> > > seal up. If that's true then I should have adequate compression.
> > >
> > > Consider this;
> > >
> > > I think I'm making half the cranking rpm's specified and the
> engine
> > > is cold, so if I were able to speed up the engine and had it warm
> I
> > > would probably meet or exceed 114 psi.
> > >
> > > Someone also suggested a "leak down test". Wouldn't the fact that
> I
> > > left the gauge hooked up to the cylinder and saw no drop in
> pressure
> > > satisfy this? I stood around for about 10 minutes wondering what
> to
> > > do next, and there was no drop in pressure.
> > >
>
>
>
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