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Hello, my name is***** you for the question. Can you tell me if the engine is overheating?
Thank you. You need to start by doing a block test. You can get a block test kit at most auto parts stores. When this engine overheats it tends to let some compression pressure into the cooling system which can keep the coolant from flowing. I would do this first. If the problem persists then you may have a restriction or collapsed hose.
Does the engine get hot when you let it sit at idle?
If the temperature is normal you will not see much flow due to the design of this engine. If you have an infrared temperature gun you can make sure by checking the temperature of the lower hose compared to the upper. As long as the lower hose is not getting above 210 degrees then you are fine. The coolant circulation is not very robust on this engine. Does the lower hose get hot?
The block test will detect combustion gases in the coolant so the flow is not important. I would definitely do this.