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Old 02-27-2000, 08:09 PM
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Join Date: Feb 2000
Location: Santa Fe NM
Posts: 48
Folks,

Before I tear into my 450 SEL (1978) dash and replace the temperature gauge is there a way to check its calibration. It all started one day as I started the car and it read 250 F. The engine was ice cold. I kept driving it until the weekend to work on it. It became better. It starts at below 100 F and reads between 175 and 250 as it warms up. I changed the sending unit, the one towards the back of the engine. No change. I changed the thermostat just to make sure it is operating at 167 F. No change. Should I change the temperature gauge? Is something else here that I am missing? Thanks for your help.

Reza
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Old 02-28-2000, 09:06 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
Unplug the wire and turn on the ignition. The gauge should go, full up or down. Now ground the wire, you may have installed the wrong sensor. I thought the gauge is a 1 plug near the front of the engine.

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