Coolant Change, 2014 Ford Fusion Titanium:
.... <cold and rain>
</cold and rain><one week laya-tur>
. I just can't....
But I beat
the engineers... this time. I figured out how to get a proper
coolant system flush/clean/flush/coolant type swap/concentration set on a system virtually impossible to work on.
Set concentration in 3 steps from 100% RODI water fill to approx. 53.49% concentration (50-60% mfg suggested range), using C₁V₁ + C₂V₂ = C₃V₃ (mixture problem). "C"s are concentrations. "V"s are volumes. Going to write it up as a regression in Excel and post it back here if I think about it.
All you will
need to do is enter 1)
the total volume/capacity of the cooling system and 2)
the measured fluid drain volume (via plug, reservoir, etc.). The math should all be worked out. You then just identify the step that gives you the required/desired concentration or just a bit more/less than required. Then, you just work the problem solving for V₂ to arrive at chosen C₃.
For instance, I have an 8L total capacity (V₃) and I measured EACH drain.... 1.725L (V₂) and 1.675L (V₂). Using 1.7L every time would work fine. I made measurements to the nearest 1 ml and calculations to a dozen decimal places throughout, until the end where I rounded to the hundredths. I am confident that my math is correct to 4 significant digits, and I will match my +/- 0.5% concentration variance against any coolant sensor/tool on the market.
To 100% de-ionized water, add 2L 100% concentrate to combined 8L total volume = 25% Concentration
Mixed (by engine) 15 minutes at temp, drained 1.725L of 25%, and added back 1.725L 100% concentrate = approx. 41.17% Concentration
Mixed (by engine) 15 minutes at temp, drained 1.675L of 41.17%%, and added back 1.675L 100% concentrate = approx. 53.49 : 46.51
(+/- 0.5) coolant: de-ionized water.
Vids and pics below.... peruse at your leisure.
Flush & drain until almost clear with de-ionized water (about 7 gallons total). Add second flush/clean product. Run for 30 minutes @ idle, 10 minutes @ 2750 RPM, x 3 reps. Flush & drain until almost clear with de-ionized water (about 7 gallons total).
This is what came out as the last gallon pumped out. Not too bad for an engine dyed with orange coolant for 100k+ miles.
This is pure de-ionized water.
Field Expedient "Idle Speed Set Tool"
"Calibrated" 2750 rpm, which is an estimated highway cruising engine speed.
Short video showing how I chose to do the lion's share of draining and flushing...
Short video of me talking and showing a bit... (Yes, my drawl is a bit out of control of late.)
Hope this helps someone, somewhere. I'm putting it here so I will have it formatted for my FB page after I get out of the hoosegow.... again.
PS - Thank you W. J. Harlan for teaching me this on day 1 of Algebra 1 (P) in 1977. See you at the Grand Reunion.