How to change coolant in a proper way?

[drtruong]

1. What is the proper procedure for changing the fluid to ensure close to 100% change?

2.Is there a procedure to "flush" out the old coolant? Which plug to open to have a complete drain the fluid ? And use distill water to flush or tap water?

3. Then how do you refill? 50/50 (coolant/distill water) or 60/40. What is the best estimation of gallons of the fluid after the drain, of course there will be ton of fluid still trapped in the engine?

Thanks in advance

 

[Tom239]

There are five points to drain from: two on the engine, two pipes under the car, and one on the radiator. It's all in the service manual. I've followed the tip given here on Prime to elevate back of the car (I use ramps) for easier bleeding.

I just replace the coolant (with Honda premixed). I change it every two years and the stuff that comes out looks just like the new fluid--no visible crud in it at all. With how clean it stays I have never felt the need to flush with anything else.

 

[TyraNSX]

Have you considered reading the manual or using the search or checking the wiki since this has been covered 100x before? http://www.nsxprime.com/wiki/Coolant_Flush_and_Fill

One common tip is to put the rears on ramps or park on a slope with the rears higher to facilitate getting all the air out of the low points of the system as mentioned above.

Save the pdf manual to your computer. It's a HUGE file and will take a while.

 

[NSXclear]

Just make sure you bleed it correctly or your car will overheat. The best way is to jack up the rear and just close the four bleeders in correct order.