Amen to that. Theoretically, the engine should run richer. Which dilutes cylinder lubrication. I wonder if mileage suffers noticeably?  

Again I say, a new radiator always worked miracles for me. I never had any luck flushing the system. In fact, it made matters worse. 

Ken L.

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Someday I'll figure out what folks think they are actually fixing by doing this. When the weather gets hot and the engine loading is up there the t-stat opening too early won’t help anything. 

Dennis