Dave,
That brass strip to the temp sender is moulded into some senders and
riveted to others. I've had one of the riveted units get loose on the
rivet and give erratic readings. It seems likely that the other type
could find a way to fail also.
The wire, where it joins the connector, can break strands from
vibration over the years. Peel back the covering boot and see if that has
happened to you.
Is fuel gauge reading OK? If it's become weird also, the voltage
stabiliser might be faulty, though mine have either worked ok or just
died---nothing in between.
And it might just be time to replace the sender. If this is original
sender, or has been in the head for a long time, use a six-point socket
wrench on it. A well-stuck brass sender can be rounded with the usual
twelve-point socket. New one can be coated with anti-seize, but don't
wrap with teflon tape since it needs to be grounded to the head.
Bob
'72 GT that has had these things happen
On Fri, 28 Jun 2002 20:20:01 -0400 "Dave Sylvain" <grnmgb@attbi.com>
writes:
> The temperature gauge on my 72 B was reading lower than usual
> yesterday.
> Today, the gauge dropped briefly from below "N" (lower than usual)
> to "C," and
> then returned half way to "N." I measured the water temperature at
> the top of
> the radiator -- it was 180-190. The wire between the sending unit
> and the
> harness appears to be intact; however, after fiddling with the
> connection at
> the sending unit, the gauge doesn't work at all. Any ideas or
> suggestions for
> troubleshooting this apparent malfunction in the temp gauge would be
> appreciated.
>
> Thanks
> Dave Sylvain
> 72 B
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