Temperature Sending Unit - JeepForum.com

 
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post #1 of 4 Old 06-27-2003, 12:47 AM Thread Starter
AZ-CJ7
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Temperature Sending Unit

I've been having problems with my stock temperature gauge (the one that's built into the speedo) pegging past the H. I really don't believe I have an overheating problem, I just don't believe the gauge. My radiator is new, new thermostat, radiator cap, all new hoses, and no leaks. I can start out fine, after about 5 minutes, its pegged past the H. I come to a stop, then take off, and it sits next to the C for quite awhile. The engine never seems to sputter or act like its running hot. I'm suspecting the temperature sending unit, but I can't find it on this engine (85 6 cylinder). My "How to" manual doesn't show the location on the 6 cylinder, just the 4 and 8. Can someone tell me where its located, and if they think I'm on the right track? At this point, I'm not suspecting the gauge, it doesn't seem to bounce, tapping it makes no difference.

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post #2 of 4 Old 06-27-2003, 01:12 AM
awachwhiteboy
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This is just a wild guess on my part mine is right under the thermostat housing, its only a little unit about the size of a cigar and 1 1/2" long on the front of the engine. I could be wrong, it sounds like it probably is the sending unit. Also, make sure your connection/s are clean to give a good signal. Good luck.

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post #3 of 4 Old 06-27-2003, 12:14 PM
dana60cj
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On my 1975 258 there is a red wire w/wht. tracer that is on the back right corner of the head as you face the Jeep. I believe thats it, because every time I unplug it to do a valve cover gasket, the coolant gauge doesn't register. Hope it helps.

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post #4 of 4 Old 06-27-2003, 06:21 PM Thread Starter
AZ-CJ7
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Thanks for the post Dana60CJ, thats it. It's on the Port (left) side of the engine, at the back. I replaced the $5.00 part, went out riding with the AC on for over an hour. It ran even cooler than I suspected it would! I'm pretty sure the test I just gave it proves it, it's currently 106 degrees here in Tucson.
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