ENGINE MAINTENANCE - Extended Life Coolant Conduct coolant maintenance checks including freeze point, pH, nitrite and carboxylate tests at least twice annually to maintain engine protection. diluting percentages when servicing a vehicle filled with nitrite-free coolant. Minimum recommended pressure cap 13 psi (90 kPa) Maximum top tank coolant temperature 225°F (107°C) Additional Recommendations: Antifreeze is essential for freeze, overheat, and corrosion protection. The use of supplemental coolant additives (SCAs) is not recommended for extended-life coolants.
2 Nitrited Extended Life Coolant Winterfronts — Minimum allowed air passage area 120 in.І (774 cmІ) For nitrited formulations (NOAT), a heavy- duty extended life coolant that meets ASTM D6210 and Caterpillar EC-1 specifications must be used. The change interval for extended-life coolant containing nitrite and molybdate is 750,000 miles (1,200,000 km) or 12,000 hours of on-road use (8 years or 15,000 hours of off-highway use) on initial fill with no extender added. The change interval is 1,000,000 miles (1,600,000 km)/20,000 hours/8 years with an extender addition at 500,000 miles (800,000 km)/10,000 hours/4 years.
Recommended Extended Life Coolant Suppliers NOTE Authorized PACCAR Engine dealer Coolant volumes are dependent on chassis model and cab/ sleeper heater options. ® Extended Life Coolant Nitrite-Free Extended Life Coolant Information on using Extended Life Coolant (ELC). Nitrite-free organic acid technology coolant (OAT) may be used if it meets DAF 74002. Perform these maintenance procedures according to the Preventative Maintenance Schedule. The change interval for nitrite free coolant is 600,000 miles (1,000,000 km) or 6 years, with no extender needed. DO NOT add coolant extender to nitrite-free coolant. Follow the coolant supplier's drain/flush/fill/ Y53-1185-1E1 (04/16/18) 51