Well, i just got it all up and running again. MCT5 sure did leave some nasty gunk in my blocks! I swapped over to Pentosin 90/10 mix.
Here's the pics
I first drained the loop, then ran a 50/50 mix of distilled and vinegar, then drained and ran distilled through it a while to flush out, then broke everything down.
Here's the before
Here's after..
When tightening down the Storm block one of the screw's heads just snapped right off! A quick run to home depot and i devised a better solution. I mounted studs rather than screwing down. Studs should offer better mounting for bare cores of course cuz you cannot come down and have it not straight. Im sure this is nothing new, but it is for me
I cannot directly contribute this to the change in fluid cuz i did flush out the rad and run the fins under hot water to get out any dust, but i went from 38-39C load to 34-36C load! WOW! Needless to say, im a happy camper.