22-09-2018, 09:26 PM
(22-09-2018, 07:16 AM)Nigel Ricardo Wrote: I keep Screwfix version of Fernox in mine all the time, it cleans and also is an antifreeze
Fernox makes many useful chemicals for water systems.
DS3 (descaler) or DS40 (a more acidic version) are short term cleaning chemicals. You can't run with them in the system long term.
Fernox F1 is a corrosion inhibitor that you can leave in. It doesn't have antifreeze properties but is better if you do speed events because any overflow onto the track isn't slippery like a normal anti-freeze. You will not be popular if you leak slippery coolant on the start line. It also doesn't lower the boiling point as normal car anti freeze does.
Fernox Alphi 11 is a combined corrosion inhibitor and anti-freeze. Many use it but I haven't.
To clean my block/head in situ I took the approach in the picture
IMG_0318.JPG (Size: 131.99 KB / Downloads: 200)
I filled the tank and system with a solution of Fernox DS3 and ran the engine up to temperature a few times. The debris left at the bottom of the plastic tank was instructive and none of the loose crud got caught in my freshly rebuilt radiator.
Charles