Regret!
More Turbo
Joined: Jan 2011
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When your checking the coolant nitrite levels, any reading from 0-300ppm would require adding 2 pints of Motorcraft vc-9 any reading around 500ppm would require only about 12 oz. of vc-9 finally a reading of around 800ppm would only require 6 oz of vc-9. The ideal nitrite condition is 1200ppm and all the above data is taken from Wix filtration corp. and the additive amounts are based on the 6.4 coolant capacity.
VC-8 is the Cooling system additive to restore nitrite levels.
A reading above 800ppm is considered acceptable.
Between 300ppm and 800ppm you need to add two bottles of VC-8 to
restore nitrite levels.
Below 300ppm requires a full cooling system flush with VC-9 and refill with fresh Ford gold coolant.
This is from the Ford diesel supplement.
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