Originally Posted by gtr25

Read into the green antifreeze coolant vs dexcool before as I noticed the breakdown and sludging as well. Notice of caution what I found was the green is used on different rad systems that are made out of different materials. Everything that came up when I searched said the green used instead of dexcool in an aluminum radiator the green Is way more reactive to the metal and will eat away the radiator. Id use the yellow universal type. I stay with the dexcool. Has it faults, but who does the rad flush at the required 5 year or mileage equivalent like gm recommends. hope you upgraded the elbows to the aluminum ones.