- 18 Mazda CX5 AW
Yes.That’s what I’d do, except I’d use distilled water a couple of times first, then fill “pre-mixed” OEM FL-22 coolant for final run of “flush” and drain (so that the left-over liquid in the system you can’t drain out has plenty of fresh “pre-mixed” FL-22 coolant, not distilled water. see Jmaz’s post above), unless I can get “concentrated” FL-22 coolant that would be easier to do as stated in the FSM.
And if you’ve decided to DIY, do get that Lisle 24680 funnel kit (or something similar) mentioned by Kedis82ZE8 with the link in post #2 which is very helpful to eliminate trapped air pockets in the Collins system for the FINAL coolant fill.
Depending on how many times you flush, 2 to 4 gallons of distilled water, followed by 1 gallon premix mazda fl22 as flush, followed by approx. 2 gallons premix fl22 as final fill. Even though you live in California, if it ever goes below freezing, or if you ever travel to the mountains or northern states, you should check your're freezing protection. After youve run car down the street a few times, let it sit and cool down, then check with coolant tester. I still like the old ball testers as you can actually see it work. Whether it's a 5 ball or 6 ball tester, you want at least 4 or more balls floating. Last thing you want is a cracked frozen block.