OK so I have the old radiator out the new radiator in I still have to put back on the fan in the cowlings, battery and air box. I just wanted to see how I can do a proper flush of the motor and make sure I have the block filled up with fresh radiator fluid in addition to topping off the new radiator. Any thoughts? also if I use Prestone concentrated yellow/green and mix with distilled water do I do that prior to filling or just alternate 1 gallon of concentrated in one gallon of distilled.

 

what I did is when you have everything off hoses etc take your garden hose and start flushing. In one hole comes out other hole go into lower rad upper rad into engine hose etc


just mix 50/50 and start topping up. Slowly let the air escape slowly.

 

Did the same. Then did the Prestone flush according to their directions. Refilled with Peak Global green premix. Never gets above 190.

 

There are two drain plugs in the block, if you pull those the engine will drain. I probably would have done the flush with the old radiator, but that is just me.