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Temperature gauge

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Old Mar 8, 2015 | 09:21 PM
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Temperature gauge

The other day I noticed the temperature gauge in my expo was not working. Decided to dig into it today. The gauge has actually rotated around and is stuck against the stop peg. I took the cover off, rotated it back, and reinstalled. Tested it several times and it worked great. Got in the truck to run some errands and when I started it I watched the gauge spin all the way back around. Any Idea what the issue is? All other gauges work like they should.
 
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Old Mar 9, 2015 | 09:41 AM
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The temperature sending unit or the wire going to it could be shorting to ground.
 
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Old May 24, 2015 | 12:07 AM
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What is the usual operating temperature for the cylinder head temp sensor? I'm used to seeing around 200ish from a standard ect sensor. I was screwing around with the autel today and I'm showing a reading of ~312*F . The engine is definitely not running hot.

I'll be tearing into the truck next month to do a timing set , v cover gaskets, intake, plug boots, plugs, t-stat , cht sensor and a coolant change. It has a slight rattle on startup and I'm thinking it may be the chains being a little loose.
 
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