Good advice I think Stan. I had got it into my head that rads never needed servicing if you used the car regularly.
Daimler SP 250 - "To feel its eager response as you open up is to know a new motoring adventure"(Sales brochure) The adventure continues!
My Conquest is from 1954 and had overheating problems (boiling on the road a couple of times). I changed the cylinder head gasket. At the same time I flushed the engine block. I noticed a lot of silt coming off between 5 and 6 cylinder holes. So reconed that was enough. No help, boiling again. The radiator core was renewed. They told that the original was of iron sheet metal. New core has 1,5 times more vertical tubes. Also I installed new fan from Mk II. It has 6 blades. Original has 2 blades. Now running fine.