The P 30 engine, (Chevy 454) in my 1996 motorhome has started to over heat as soon as I stop for a light. The temp gauge will go up to the red and stay there until I pull away. As soon as I up the RPM's the temp will go back to normal. I have noticed a very slight increase in temp when running but not much. I have 80K miles on the engine. I had it flushed a couple years ago but it didnt seem to help.
I do not seem to notice any temp increase at highway speeds or under loads, like pulling a steep hill.
I hate to pay money to have some one guess and throw parts at it. Suggestions please.
Ed, in Pittsburgh, PA