Replacing coolant equipment - do I need to flush first?

[Wolfsbora]

Hey all, I'll be replacing the radiator, the expansion tank, the thermostat, and all of the hoses with some great aftermarket gear. Do I need to flush the system before replacing the parts to make sure the old coolant is out of everything else?

 

[akiraproject24]

Need too, probably dont need too but you could benefit by getting more of the old stuff out. AFAIK there is no block drain on this thing. I had mine done after my turbo install by a shop that just dropped what was in the radiator and refilled while pulling a vacuum. I had the orange coolant and provided the newer yellow...long story short I now have a lighter orange coolant. A flush would help get out more of the orange and give ya a brighter yellow.

 

[akiraproject24]

Other than a cleaner looking fluid, the yellow and orange are compatible so you shouldnt have any issues there

 

[Intuit]

It'll be a lot less messy if you get out what you can, first.

Following the manual you only get out about half.

https://www.fiestastforum.com/threads/unable-to-pull-vacuum-on-cooling-system-resolved.28344/

.