Overheating RP

[John Mason]

You could try removing the radiator then flushing thus allowing you to move it around tip it upside down and also shake any loose stuff out. Also remove the water inlet manifold and flush from there use a stiff bottle brush in the intake hole to remove anything around the cylinders. I recall flushing my seven radiator etc with the radiator still coupled and when no improvement I removed it and found the bottom tank and outflow pipe full of rusted scale etc.

John Mason