Radiator cleaning - economically of course!

[Robert Leigh]

Hi,

Despite searching the Forum I can't find anything on cleaning out a radiator. I have a functional non-leaking radiator but have noticed the running temperature has gradually increased over recent years that has no engine related explanations. I can see a skin of brown scale through the cap.

So: what potions can I flush out the core with, preferably something proprietary and economical - and with a residue that I can safely dispose with a clear conscience! I know about citric acid but wonder what experience others have had with it? What about kettle etc descalers? And maybe not relevant, I've heard that Milton fluid is great for taking that brown tea stain out of stainless vacuum flasks - that's the sort of idea I'm looking for - but would it work in a radiator?

I know I'll take a risk of springing a leak but what's worked for you?

Thanks, Dave

Some of the problem could be sediment and rust in the block. While you are sorting it out I suggest removing the hoses and using a pressure hose on each engine water connection in turn.