Temp gauge
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Freshman User
Joined: Feb 2009
Posts: 46
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Temp gauge
I have a 95, 4WD,4.0, about 250k miles or so. Recently the temp gauge started swinging between very low, to about midway, maybe a little more. Dosen' t seem to matter whether or not it is moving or sitting still, still swings. I replaced the t'stat, but made no difference. The heater still works quite well, but it is a little un-nerving to see the gauge move that much. Anybody got any ideas?
Cargo Master
Joined: May 2004
Posts: 3,007
Likes: 5
Might be the temp sending unit fail.
Might be the temp guage fail.
any other symptoms of fail?
Bubbles in the coolant? Brown scum on the radiator coolant?
Does it go up and stay up, or does it swing back and forth during normal operation?
Might be the temp guage fail.
any other symptoms of fail?
Bubbles in the coolant? Brown scum on the radiator coolant?
Does it go up and stay up, or does it swing back and forth during normal operation?
Thread Starter
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Freshman User
Joined: Feb 2009
Posts: 46
Likes: 1
There is brown scum in the overflow resevior, though when I changed the t'stat, the coolant was green.
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Freshman User
Joined: Feb 2009
Posts: 46
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I do have a small leak (ver small) in a rear freeze plug, I wonder if it could have gotten just big enough to cause a sapratic pressure issue in the system?
