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Poorly Treated Indications for Diesel Engines

What happens if a diesel engines cooling system is NOT treated properly with chemicals?

  • Corrosion of the steel and cast iron surfaces
    • Hard water scale buildup on the cold side of the liner, creating an insulating effect and leading to hot spots
    • Fouling of the heater core with silica gel and phosphate sludge, resulting in reduced heat to the cab and bunk heaters
    • Corrosion of the water pump impellers
  • Thermostat malfunctions
    • Scale insulates on-off fan temperature sensors causing improper fan operation resulting in overheating
    • Fouling of the heat exchangers with silica gel or phosphate sludge from the antifreeze
    • Severe pitting of the wet sleeve liners
    • Malfunction in block heater due to phosphate scale buildup
  • Water pump cavitation due to foaming
    • Water pump seal failure due to excess dissolved solids and/or high phosphate levels
    • Hoses can become soft and brittle without proper protection
  • Corrosion of the copper or aluminum radiator cores
    • Solder corrosion and consequent solder bloom fouling


cooling system tech facts diesel engines

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