Mark,
Unless your neighbors are Mr. and Mrs. Claus, 150 degrees is not normal
operating temperature. A 68 should have a 180 degree thermostat so if the
coolant isn't close to 180 degrees at the top of the radiator, it hasn't opened
completely. Leave the radiator cap off to prevent any pressure buildup and
drive around the block a couple of times, then stick your thermometer in the
tom of the radiator again, if the temperature reads in the 180 degree range,
check your gauge and if the needle is at the left edge of the box, you are fine.
Roy
67 Crown FDHT
In a message dated 5/23/2003 1:22:15 AM Eastern Standard Time, Mark McDonald
<tomswift@xxxxxxxxxxxxx> writes:
>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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