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Have u tried saltaway, Has compression check been done?? Compression gases in cooling system causing cooling issues!!
New problem? Old problem? How old plugs and wires?
It was only running hot at high rpm, if I backed off the rpm it would cool down. Do you think this could be an impellar? Or a vapor lock in the cooling
Thank you all for the input.
As expected, when jumping the ground directly to the engine bracket, problem disappears.
Still haven't pulled
In thread #1 you mentioned bent valves,#3 you said valves okay,whats the story??