Originally Posted By: Smcatub
Originally Posted By: bowlofturtle
I know you dont need an exact 50/50 mixture. But if i put 1 gallon of pure coolant in my mixture will be around 70/30 wouldn't it? I dont know how to do this math at all, someone help me.
As stated in your original post - 9.25 quarts total capacity. I don't know your original mix. I'll assume 50/50.
So 4.625 quarts each of H2O and coolant.
You used almost the full gallon of distilled H2O after your repair - close enough to just say you used the whole thing? So you drained a gallon. Half would have been coolant, half H2O. You put in pure H2O.
2.625 Qts H2O + 2.625 Qts coolant (remaining after 2 Qts of each were lost during the repair) + 4 Qts H2O is in their now. Or, 6.625 Qts H2O and 2.625 Qts coolant
2.625 / 9.25 = 28.4% coolant
You want to be at 50%, so you want 4.625 Qts coolant total.
So, drain out 3 Qts, bringing you to 6.25 Qts left. Since it's 28.4% coolant you're left with (6.25 * .284) 1.775 Qts of coolant in the system. Add 3 Qts of undiluted coolant and you now have 4.775 Qts coolant in your 9.25 Qt system for a mix of (4.775/9.25*100%) 51.62%
Use the whole gallon and you get 5.47 gallons coolant for 59%
So, drain from 3 to 4 quarts and refill with coolant for between 51% and 59%. I'd go for the 59% because then you have a little buffer - you can add up to a quart of 'make-up' coolant in case of a leak and still have your 50-50 mix.
Nice!!! TY, So if i do another drain and fill, i should be in the 60% ballpark of coolant, it makes it a little easier for me to do that then to try and aim for 3qt.
I was trying to do the math, i just new putting in 50/50 would be under and 100% would be over.
Plus doing a full gallon earlier and a full gallon now, well i should have a good amount of new coolant in there. Any place online selling nissan green for cheap, under $20? Last i called the dealership a few months ago, i got a $25-35 price.