Coolant returning to surge tank continuously

[Redland1]

(04-26-2022 )tree98 Wrote:  Yea it circulates constantly. If you value your engine you'll drain that green coolant and replace with the proper red coolant that's supposed to be in an industrial diesel engine. That green stuff will eat your liners from the inside out.

I purchased the truck from an International dealer and it has the green coolant inside.I actually drained and refilled it with new coolant.I thought the difference between them was longer life? Also what’s the process to change out the coolant from green to red?