You might not have overheating issues
We had a recurring issue with occasional overheating on our RV till our new mechanic told me to use a infrared thermometer and measure the temp of the upper radiator hose the next time it overheated. ...
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You can do a lot with those temp guns. Saw a YouTube video on using one to find misfiring cylinder by checking temps at exhaust manifold right where it attaches to the head.
