12-10-2018, 10:59 PM
(11-10-2018, 11:28 PM)Hedd_Jones Wrote: Oxalic acid. Bought in powder form off ebay cleans out blocks and heads superbly (mixed at 2 or 3 times the dose on the box). Not so good on rads. Put a cork in the side water manifold and fill her up to thw top of the top water manifold to fester a week or so. Then flush her out. The fluid will come out green
This works well on ferrous metals, https://www.bilthamber.com/corrosion-pro...nts/deox-c did a couple of blocks with it, stripped them down inc removing coreplugs, degreased and left them soaking for a week, no rust or corrosion in sight.