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honda 400ex 69
09-25-2005, 04:43 PM
alright so i got some engine ice and looked in the booklet on how to change the coolant but it doesnt tell you how so if some one could give me the steps on how to drain/flush and refill the coolant

thanks
Jersey450R
09-25-2005, 04:45 PM
Just undo both hoses and let it drain out, clamp hoses back on, and fill it up. not sure on how much.
honda 400ex 69
09-25-2005, 04:53 PM
will i need to flush the system or will that not matter
redlined94
09-25-2005, 04:59 PM
Ya you need to flush the system. I have heard that you just run distilled water through it a few times and that gets it pretty well cleaned out. If you just drain the radiator and put the engine ice in you wont notice the complete change the engine ice can do. You will be amazed at how much is left when you flush the system.
honda 400ex 69
09-25-2005, 05:21 PM
do i run the quad with distilled water like on a normal ride or do i just let it sit in neutral and rev it a few times to clean it all out?
redlined94
09-25-2005, 05:47 PM
Ya just go and ride like you normally would. I wouldnt ride balls out but ya know ride it enough to where it gets to run through the motor then drain it again and i would do it one more time just to be safe.
honda 400ex 69
09-25-2005, 05:55 PM
alright thanks for the help
09-25-2005, 06:07 PM
You don't have to toke off the hoses. take off the radiator cap. Then there is a drain bolt in the water pump housing. Take it out and it will drain the system. the coolant will come shooting out like a hose be ready for it. Put the bolt drain back. Put in water, run it a couole of minutes. Drain the water put the Engine Ice in and your done.
cals400ex
09-26-2005, 11:53 PM
yep, the bottom of the water pump housing is an 8mm bolt. just take it out and coolant will come out. careful where you do this at. it will fly all over the place. you will have to crack your radiator cap first. then you can drain the overflow tank by removing the line at the bottom of it. i ran distilled water in my bike for awhile. i made sure i got the bike up to 180 so the thermastat kicked on and coolant ran through the lines. i did this twice.
quad2xtreme
09-27-2005, 03:15 PM
You can use a shop vac to help suck out every last bit of the old fluid if you want.

I haven't done it on a quad but used to on the old small block Chevy.

/Jon