I'm thinking about doing a coolant flush on my f4i. I was thinking about swapping it to the blue stuff... Supposedly it's better. Right now it has green coolant. Just wondering if some of the green mixes with the blue could that be a problem as I imagine there would always be some residue of the old coolant. Should I just stick with the same kind? Also what is the best way to drain the radiator on the f4i?

 

You really want to get out as much green stuff as you can. After you drain it, fill it with water and run it until the thermostat is open, then drain it out. Repeat until it's all clear water coming out. Final fill with the good stuff.

There is a drain bolt on the water pump. Make sure to replace the sealing washer. You could always disconnect a hose to drain it also.

 

I think the only problem would be turquoise coolant...

 

I would also suggest what 74demon recommended, and fill with water until the green is flushed out. It should only take once or twice filling it with water to get rid of it all. There is probably a drain plug on the cylinder block in addition to the water pump to get most of the coolant out. A little bit mixed together won't hurt, but it can cause gelling in the coolant when they're mixed in larger quantities.

The blue Honda coolant is an excellent choice I use it in my bike.

 

Ok thanks guys

 

If you really want to "flush" it the official way, after draining the rad and block, a mixture of distilled water and vinegar is recommended. Run that for 5-10 mins or so and drain it again. Then proceed to use your coolant of choice.

 

If you're talking about Engine Ice, that stuff can't be mixed with any other type of coolant as per directions on the bottle. If you want to try something that'll give better heat conductivity, try Bel Ray brand coolant. It can be mixed with any other type of coolant and is supposed to be better than your regular coolant which is an added bonus.

In all honesty, I'm running Engine Ice right now and it only runs cooler for about a month or less and then it just goes back to regular temperature again anyways (or so I've noticed).

 

thanks again!

 

As long as its running at the regular operating temperature and not overly hot, then the coolant is doing it's job. Running an engine cooler than its designed to isn't desirable.

 

I currently run Engine Ice and like it pretty well, the engine temps are lower than standard 50/50 mix. I have to do a flush myself and I think i'll give the Evans NPG Coolant a shot this time around.