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Old 09-25-2013, 02:51 PM   #1
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overheating 1989 6 cyl YJ

I am overheating (maybe). I put in a new weber 2 bbl carb. Might not be related but now I am overheating. I run at 240 degrees. I drove it until it reached 240 and then opened the radiator (carefully) and it was not circulating in there. I ran it a bit with no thermostat to see if I had a clogged system - it was circulating fine. I replaced the thermostat with a new 195 degree one got it up to 240 - it did drop down to 220 but then climbed back to 240 and stayed there so I assume that the thermostat opened. I again checked for circulation and no circulation. Water pump and radiator have been in there a couple of years but not much mileage (under 5,000 on them). I have burped it repeatedly (including with the heater running full blast). I am out of ideas. I'll re time it and adjust to a richer fuel mixture but I don't think that is the problem? Any ideas?

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Old 09-25-2013, 03:19 PM   #2
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Whats the condition of the interior of the radiator? Does it look calcified?

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Old 09-25-2013, 03:44 PM   #3
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when you ran it without the thermostat what did the temp do
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Old 09-25-2013, 06:05 PM   #4
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Thanks guys, I really do appreciate your comments. - I fixed it. It turns out that it was not overheating at all. I replaced the temperature sensor and that did it. I guessed at that. If the guage was reading 240, then dropped to 220, than ran back up to 240 and stayed there then the new thermostat had to have opened. It opens at 195. so... It is now reading 200 or under consistently.
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