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  1. simp5782

    Changing out the coolant on the NHC250

    I don't know what the NHC issues are. 58,000 miles with a #18 button and I have my fuel way up but it is metered right. Towing 40,000 to 72,000lbs over mountains running the truck 10 to 14hrs a day. Green coolant with the prestone SCA additive. Coolant is black from black pepper being in the...
  2. simp5782

    Changing out the coolant on the NHC250

    Whitney Cummings is a pretty good comedian too :D
  3. simp5782

    Changing out the coolant on the NHC250

    On another note if it was s truck those Thompson river road loggers drove around it probably was filled with creek water. Or even worse. Spring water Sent from my SM-G935P using Tapatalk
  4. simp5782

    Changing out the coolant on the NHC250

    Did you use your voltage meter to see how much energy your coolant has? A simple bad ground can cause enough electricity in the coolant to eat thru a liner. I had several navistar engines that had electrolosis. Sent from my SM-G935P using Tapatalk
  5. simp5782

    Changing out the coolant on the NHC250

    I use the walmart must add water green coolant and distilled water. 70/30 and two bottles of the sca additive Sent from my SM-G935P using Tapatalk
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