The part they are trying to sell you is probably correct. The one you are
describing on your car is the one which operates the idiot light/gauge
sentry device. The sender which operates the gauge is too the left of the
two terminal device, and has only one terminal, and it is much smaller.
Look again, I think you'll find it.
Dick Benjamin
----- Original Message -----
From: "Mark McDonald" <tomswift@xxxxxxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Thursday, May 22, 2003 11:22 PM
Subject: IML: Temp sending unit for '68
> I am having a devil of a time finding a new coolant sending unit for my
> '68. I hope I am looking at the right part. If you are facing the
> engine, it is located about 2" to the left of the thermostat, between 2
> heater hoses. It looks almost like the bottom of a lightbulb with a
> hexagonal collar on it. Above the collar is a small cylinder with 2
> blade connectors set at right angles to each other. The dimension of
> the hex collar is 15/16".
>
> I have gone to 4 different parts stores here and they either don't even
> have a number for this part, or what they do have is way too small. Pep
> boys had it-- according to their computer-- but the part is about 1/3
> the size of the thing on my car. Is what I am looking at a housing? In
> other words, if I take it apart will I find the sensor inside this
> thing? I am pretty sure I am looking at the right thing, because when I
> disconnect it my gauge goes dead.
>
> I am trying to replace this because my gauge never gets up to normal. I
> tested the temp of the antifreeze in the radiator and it got up to about
> 150 degrees after about 20 min. idling in my drive. That would seem to
> be close to normal temp (?), but the gauge never moved above about 1/4
> of the way over toward the center.
>
> I do not think the thermostat is the problem, because when I start the
> engine cold and look in the radiator I do not see instant circulation of
> antifreeze, as you would expect with a thermostat that was stuck open.
> So I thought maybe the sending unit was bad . . .
>
> But I cannot locate a sending unit. Can anyone help?
>
> Thanks, Mark
>
>
>
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