I was given a 120mm radiator from a computer cooler which had a seized pump. The liquid inside the sealed system seemed to be pure ethylene glycol. Glycol has a better heat transfer than water (they used to use it for cooling Spitfire engines) and as I have 4L of undiluted antifreeze, I was thinking of using that, if it isn't too viscous for the pump to handle. The radiator has rubber hoses fitted, and I have plenty of 8mm pipe and pneumatic push-in fittings. It'll be a long time before I get to fitting the cooling system to my machine, which is at the plans done and steel bought stage. Now I just need my wife to stop finding me jobs to do, so I can get on with the build in peace.

Cheers,

Rob