Hi Bob, Some time ago I had a 70 Morgan with the Ford 1600GT engine.
The sending
unit in the head had a small brass tab that attached to the wire. At
times when
you were driving the temp gauge would increase to peg on the hot side;
but, when
you came to a stop, the temp would drop back to normal. It turns out
the tab
was loose. Driving increased airflow through the rad, causing the tab
to swing back
and ground out on the dip stick.
Just a thought. Cheers Geoff Burkholder.
Robert K. Alexander wrote:
>
> Does anyone have a simple and inexpensive solution to replacing an temp gauge
> sending unit? The one in my '67 +4 rests on hot (as it should), but remains
> on hot when the ignition is on (as it shouldn't). Although there is a bare
> breath of life in it (it sometimes wanders down below Hot nearly to N), I'd
> like to replace it. Of course, Smith doesn't make them anymore and, of
> course, the Morgan sender/guage is exactly backwards of any other guages in
> the world - at least the I'm aware of.
>
> Morganspares will send it off to have the guts of the guage replaced and a
> new sender for only $175. I've located a Hillman guage with the same case as
> the Morgan's and a B/W face that has real numbers (not authentic and not a
> raised, but a real temptation), and could swap guages and faces and probably
> find a sending unit that works somewhere, but before I do this, I thought I'd
> field the question to the experience of this group.
>
> Oh, yes. MOMA (now here in Albuquerque) can transform an Oil pressure
> guage to good mechanical temp guage for about $100 (+ the oil
> guage/sending unit). But I'd rather find a less complex & expensive fix.
>
> Bob Alexander
> Los Lunas, NM
> '67 +4
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