Join Date: Jan 2007
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I've heard these things go bad after a year. Could you have gotten some old ones? I always drain a few ounces from the radiator drain pet****.
Read it within a few seconds and I always double check the freeze protection with a Prestone antifreeze coolant tester. Since I completely trust the old style coolant tester, if the freeze protection doesn't match, I wouldn't trust the SCA or nitrate reading either.
2000 F350 Crewcab 4x4 7.3l with AFE stage II, MBRP 4" turbo back, Turbonetics "Quick spool" turbo with .84 housing, DP Tuner chip, 80 tow,80 econo, 120 race.