My TJ has been overheating lately. It will run at operating temperature (210 degrees) for a while then shoot up (approaching 260) all of a sudden. Most of the time (not every time) it will shoot back down in temp just as quickly as it shot up after a couple of minutes. This seemed like it was a thermostat issue so I went ahead and swapped that out. It continued to overheat so I went ahead and changed the fan clutch which also failed to solve the overheating issue. The only other cause I could think of is a clogged radiator but it was replaced by the previous owner about 2 1/2 years ago (5000 miles ago). Does anyone have any suggestions or advice?
Thanks in advance.
Thanks in advance.