12-01-2018, 08:44 AM
My car had been running progressively hotter over a period of some years. Before stripping it down I ran a descaler through the system (got it from Halfords, forgotten which one). On disassembly I found the side manifold about 80% blocked with semi-solid crud. Part of my rebuild included winkling coat-hanger wire inside the block waterways as far as I could get it, and copious flushing of block and head. I rather suspect it will run a bit cooler now!