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Old 02-15-2011, 09:39 PM   #1 (permalink)
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Location of Temperature Sending Unit?

97 Dodge 12v My temperature gauge is kind of wonky at times. so I want to change the sending unit.

Where is it located? Pics would be great. Thanks
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Old 02-15-2011, 09:44 PM   #2 (permalink)
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the CTS (Coolant Temperature Sensor) should be at the front of the motor near the thermostat.

In this pic of mine, the CTS is on the furtherest right, near the radiator hose, and the oil fill cap.
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Old 02-15-2011, 10:02 PM   #3 (permalink)
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On a '97 12 valve the coolant temp sensor is inder the intake housing behind and slightly left of the fuel filter. I do not believe you can replace it without removing the filter.
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Old 02-16-2011, 10:10 AM   #4 (permalink)
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its lotsa fun to get too and takes a mighty big wrench too so you will learn to cuss before you have changed this one!
i did mine when trans was out and it was still tight to work at!
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Old 02-16-2011, 10:47 AM   #5 (permalink)
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its lotsa fun to get too and takes a mighty big wrench too so you will learn to cuss before you have changed this one!
i did mine when trans was out and it was still tight to work at!
wonderfull
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Old 02-16-2011, 12:10 PM   #6 (permalink)
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Old 02-16-2011, 12:26 PM   #7 (permalink)
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Well that doesnt look that bad to get at!
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Old 02-16-2011, 12:34 PM   #8 (permalink)
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It's easy to get at with your hands but not with a tool.
I've never run into a bad coolant sensor but have run into at lot of them that aren't plugged in all the way or not plugged in at all.
For some reason the coolant sensor connector isn't like the rest of of the sensors used on the vehicle that are hard to pull apart.
It comes apart way too easy.
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Old 02-16-2011, 06:31 PM   #9 (permalink)
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Well silly me. I assumed the '98 12 valve sitting in my garage had it's sensor in the same place as my '97. Wrong!!! So my info is bad, sorry. FWIW, the '98 has a big plug there, something else I need to change when I do the swap.
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Old 02-16-2011, 07:11 PM   #10 (permalink)
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I assumed the '98 12 valve sitting in my garage had it's sensor in the same place as my '97. Wrong!!
Moving the sensor was part of Cummins solution to people complaining about the fluctuating coolant gauge on the earlier years.
That along with computer reprogramming.
The temp still fluctuates the same, you just can't see it.
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Old 02-16-2011, 08:33 PM   #11 (permalink)
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I changed just used a big socket wasnt to bad at all maybe 15 mins the problem seems to be fixed now I will know forsure once i pull my trailer thanks for the help
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