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Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.
Has the actual engine temp been tested at all to see what the actual temp is when this is occuring with a temp gun?
Let me know so we can continue,thanks Pete.
I have seen issues in the past before with a faulty reading engine coolant temp sensor sending an incorrect temp signal.This is where the engine itself is not actually over heating but the coolant temp sensor may be acting up at certain temps causing the over heat condition you see and the temp sensor itself may need replaced.
I have also seen issues with leaking cylinder head gasket.This isnt a leak where fluid will leak externally or internally but to where the gasket will leak exhaust past it into the cooling system and cause this here.If a block test was not done I would have a shop do this testing to see if there is a cylinder head gasket issue here at all needing replaced.The test usually takes less then an hour to have done in most cases.
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