Bob, the fact that the gauge will peg when the wire is grounded still doesn't
mean that the correct signal is getting to the gauge. The biggest problem with
roadster temp gauges is not getting a good ground at the sending unit, which
will make the gauge read low.
Bob Mann wrote:
> Tom -
>
> On the gauge issue, just to clarify, it reads properly. That is to say,
> it reads the temp it sees up top at the head, which was apparently not
> elevated. When grounded, it reads full scale.
>
> Based on the FAQ, I am about to pull the radiator, just to remove that
> issue.
>
> - Bob
>
> Thomas Walter wrote:
> >
> > >Thanks, Toby. What's odd, is that in this case, the hose is collapsing
> > >while under pressure.
> >
> > Bob,
> >
> > Usually when I do see that happen, rare with a roadster, I suspect
> > a bad hose. Since you have a new gates hose, I would not suspect
> > it is the hose... but hard to tell.
> >
> > As someone pointed out the older hoses had wire springs inside them
> > to prevent the collapsing of the hose. Nissan never used the spring,
> > but it was common on aftermarket hoses. Newer hoses rarely have
> > the spring, as it seems they have improved the hose itself.
> >
> > Your original question wondering about the radiator condition seems
> > reasonable. If in doubt, might be simple to pull the radiator and
> > have it rodded out.
> >
> > Since your temp gauge was not functional, hard to know if it has
> > been running hotter over a period of time, or just recently. When
> > I see a roadster suddenly running hot, not a bad idea to check
> > the ignition timing and mixture settings (pulling the plugs to
> > look will give you an idea).
> >
> > Cheers,
> >
> > Tom
>
> --
> - R.W. Mann & Company, Inc. > Airline Industry Analysis
> Port Washington, NY 11050 > tel 516-944-0900, fax -7280
> mailto:Bob_Mann@RWMann.com > URL http://www.RWMann.com/
--
Gordon Glasgow
Renton, WA
http://www.gordon-glasgow.org
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