Originally Posted by kizwan
I can't believe I have to bump this. @ZytheEKS
, can you reply to my post below?
I want to add that I follow martin's guide
on flushing blocks & radiators. It's already over a year now - including a couple of draining but re-using the same coolant every time (filtered using filter paper when refilling). The Pastel Blue Berry still look like new, either in tubing or in reservoir. No change of colour whatsoever. If distilled water is ridiculously expensive, I recommend follow this guide. Can't go wrong with this guide.
You want to flush ESPECIALLY if it's a new rad. Depending on what brand of rad you get it could have debris in it, many manus don't clean out the flux after soldering it together so a new rad may have an increased chance of flux getting caught in the loop. HW Labs tends to be REALLY good about not having debris in the rad, but there's still the flux issue.
As far as I'm aware all pastel coolants tend to turn a brownish color in the presence of a wacky pH value, maybe Cyphon will know better on that though.
With a new radiator I'd turn your tap on as hot as it can go, 20% lemon juice to 80% hot water, put it in the rad, and play bop it for a few minutes, drain, then flush wtih the bicarb.