Problems with Green?
None....just as long as you're back at it to flush and fill every 25-30k miles, and have absolutely no Dex left in the system to mix with it. All water based coolants will break down and have detrimental effects on internal components if left unchecked. Green has itís corrosive properties also.
Draining 1/3 to 1/2 of the system's total 6 gallons, filling with water, running up to operating temperature, and draining again, then topping off with fresh coolant will not achieve complete replacement of coolant. You also wonít have the proper 50/50 mix.
It will however be far better than the toasted 90k mile fluid that was there before. Dropping the lower hose and pulling both engine block coolant drain plugs, flushing the system, and replacing with the proper level (6-gallons) of 50/50 mix will provide a complete service of the system.
AND, if you decide to change coolant types, this procedure will give you no problems with interaction between incompatible coolants mixed together, with 'Evans' being the exception (no water used in flushing).
2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air Use-ta Haves 2006-6.0 3500 WT DRW ExCab Flatbed, 2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab I Live my life in such a way that when my feet hit the floor in the morning...Satan shudders & says "Oh shit, he's awake!"