I acquired a ‘56 jd 60 several months ago in good shape for a decent price. I knew the core would eventually need to be replaced before I bought it. I was told by the seller that he had used a stop leak in the radiator.
I drained and flushed the system with straight water and refilled with 50/50, and cleaned out the radiator fins. The tractor has always run at the very upper end of the normal range of the temp gauge and goes slightly into the red after shutdown. This is running it under no load, and it concerns me. I got a new thermostat but haven’t changed it yet, and it’s probably the original water pump on it.
Is it possible the the stop leak could have plugged up something in the engine block or head? And if so what are my options to flush it out or something else? I asked the guy I bought it off of what he used and he said it was K-Seal HD and that he only used one bottle but left it in the system.
Maybe I’m just being paranoid before I have gone over the thermostat and water pump.