IMO, part of my decision would be because of the slow reaction of the
electric gauge. I have heard them referred to, more than once, as pressure
indicators (yes/no) rather than gauges. It is hard to know, after 30 years
what pressure you really have, versus what the electric gauge is telling
you. Since it is an electrical signal, I would expect the condition of the
wiring to/from the gauge to make a big difference in your reading.
james
----- Original Message -----
From: Dodd, Kelvin <doddk@mossmotors.com>
To: 'David Councill' <dcouncil@imt.net>; <mgs@autox.team.net>
Sent: 20 May, 2002 9:43 AM
Subject: RE: oil pressure guage
> David:
>
> I don't have an answer as to why MG changed to the mechanical guage,
> it could have been warranty related.
> The electrical sender did have a high failure rate and was extremely
> expensive to replace. I'm remembering about $95.00 from the dealer back
in
> the 80s. It was discontinued by Smiths, so many owners had to do without
or
> convert to mechanical.
>
> There are a couple of repros out on the market now which are
> reasonably priced and seem to be dependable so 68-71 owners don't have to
> scrounge used units, or convert.
>
>
> You are correct, the flex line connects to a fitting on the
> firewall, instead of the sender unit. The block fitting is the same.
>
> The mechanical units are pretty dependable and as accurate as
> necessary. Be sure to replace the leather seal at the guage if you undo
the
> copper line.
>
>
> K.
>
>
>
>
> > I never fail to learn something new. But oftentimes, it comes with a
> > question. I have over the years owned two 71BGTs and a 65B at
> > different
> > times. I'm now restoring a 72B.
> >
> > Today I removed the dashboard. Much to my surprise, I find a oil line
> > running to the oil pressure gauge. I always thought that MGs
> > went to the
> > electric gauge from a sender unit in 68. Now it looks like
> > they decided to
> > go back to a mechanical gauge in 1972 (although the gauge
> > itself looks the
> > same from the front)..
> >
> > Was there a reason for this?
> >
> > On my 71, a small line went from the sending unit to the
> > block. Do the 72+
> > cars just eliminate the sending unit and just attach to that
> > same block
> > fitting?
> >
> > Since my 71BGT's remains are being transplanted into the 72B
> > body, it looks
> > like I could go with either configuration, although I suppose
> > I'd have to
> > do some rewiring to use the sender option. Is the direct line
> > to the gauge
> > better?
> >
> > David
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