So, I’ve found some icky-ness in my cooling system that I want to flush through before the new engine goes in.

I was thinking of connecting the rad to a puddle pump and then firing some solution-or-other through it.

I can start with hot water but it will obviously cool in fairly short order. Can anyone suggest a product that you’d expect to do the best job please?

Thanks,

Tim

I have in the past, put dishwasher tablets in the cooling system and run them for a week or so, drain, and flush, and drain flush etc a few times, the crud that came out was incredible

Sometimes, just a good flush with a hose pipe attached and some pressure, then back flush as well works

This was in a crossflow

steve

Citric acid is good for aluminium.. Judging by how my aluminium pans come out of the dishwasher I don’t think I would use dishwasher tablets to aggressive for aluminium.

At work we use Forte bio-degreaser and rad flush. Works better then anything else we've tried. If the rads off, pour in and 1/2 fill with hot water. Cap off and shake.

https://www.forteuk.co.uk/product/bio-degreaser-cooling-system-flush/