I will be changing the coolant on my 2005 F4i in the next few days.

I will be using Honda HP coolant so it is already diluted. My question is do you flush the system with water after draining the rad and block or just refill it?

 

Flush w/ distilled water...then refill w/ radiator fluid.

 

Alright but when I flush with water and then drain will there be any residual water if I drain the rad and block? because I am using a pre-diluted coolant.

 

Not of any consequence. Flush out per steps outlined in the service manual & refill.

 

Ok thanks