Coolant Question

[Keith Strehle]

I drained what looked like about 12 to 14 gallons of the old GREEN
coolant but didn't flush the system. I'm refilling the system with RED
FLEETGUARD PRECHARGED coolant.

I had already added two gallons of the RED stuff when I realized we're
not supposed to mix different types of A/F.

So? How important is it to flush all the GREEN stuff out of the system
before adding the RED?

Thanks...

Keith
84FC35