Quote Originally Posted by grifty View Post
Is there a reason you need to do a coolant flush? is the water brown and has signs of rust? if the water is still a good colour with no signs of rust then i would just dump the old stuff and put new honda coolant.
Not particularly. It looks pretty clear green like any other coolant with no visible sign of rust. Just thought of changing it as good maintenance practice since for all that I know the coolant could be more than 4 years old. I think I'll leave the present coolant in there till my next oil change. But would using an aftermarket additive to get "suspended aluminium filings" out (as the additives tend to claim) be advisable?