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Done a bit of research on this, cant find anything 100% on how to clean the inside of an alloy radiator

mine isn't blocked but Im suspicious that there may be a light build up of corrosion in mine that may be reducing the cooling efficiency..

Just looking for something to soak it in, I don't want to use additives and have it running though my engine

cheers

yeah done that already, I have a bit of kit that will also throw compressed air down it....

im looking for something that will get it back to its efficiency at new

really get rid of everything you know..

people have suggested using white vinegar

The idea is to run it through the system, get some temp into things. There is a detergent component in the stuff. You have a heater core and all the ally bits in the engine. It can't hurt anything.

The best trick is to flush the radiator/heater/engine block clear before you put this stuff in. Don't forget to remove the bung from the block so it's drained properly.

Find a nice road to take a leisurely Sunday cruise for a couple of hours while you run it. The effect should be similar to a long cycle on a dishwasher.

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