My cooling system normally ran close around 201 or so and didn't fluctuate much. Now it will heat up to 208 or 210 then cool down to 197 and constantly do that the whole time. I have changed the tstat (got from dodge), water pump, completely flushed and refilled with dodge coolant and bled air completely out. The fan clutch does not completely disengage when it is first started and cold where you could stop it spinning while running. I also unplugged the fan clutch and ran it and it did the same thing just a little faster. It acts like one of the times it disengaged it didn't cycle the whole way and got stuck or something. I am kind of thinking the fan clutch is my problem just want to verify before I go spend that kind of money. Anybody got any ideas? I have also ran it with the rad cap off until the tstat functioned a few times and there was not one bubble that came out. Coolant reservoir is working properly as well.

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By the way there is NO white smoke.

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Nobody????

 

Having similar issues and haven't heard any help or updates