Changing out my coolant from an eth glycol, to Engine Ice a prop glycol and need to flush my system out fully before putting Ice in. Only problem is the ole '11 Grizz 700's radiator has a top tube and a 'mid-ways' tube, which isn't conductive to draining at all. Best I can figure because the lowest tube is only in the middle, at best I'm only able to get half the radiator to drain. So instead of multiple fills and flushes what's the best way to get my coolant system completely emptied of the old coolant?

Best guess right now would be to drain the whole system, disconnect both rad tubes at the rad, stick a compressed air nozzle down the top fill hole with a rag around it and blow it out.

Any better ideas?

 

I'd be careful with compressed air. Better yet does owners manual show how? Maybe download a service manual?

 

Thanks for the advice. Could that hurt the engine somehow?