Mack CL series

Coolant capacity & service interval

Mack CL series coolant capacity is 34 liters. Service intervals occur every 40000 km or 600 hours. The data covers 1 configuration.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
CL703 (2002-2004)
  • Use: Normal
  • Capacity 34 liter
  • Check 40000 km/ 600 hours

Additional Notes

  • The Mack CL703 cooling system holds 34 liters of coolant, a capacity typical of heavy-duty commercial truck engines where large thermal loads require substantial fluid volume to maintain operating temperatures.
  • The 34-liter figure represents a full cooling system fill, accounting for the radiator, engine block passages, hoses, and reservoir combined rather than any partial or component-level service quantity.
  • For the CL703 covering model years 2002-2004, the coolant service interval is set at 40,000 km or 600 hours, whichever occurs first, under normal use conditions.
  • The dual-trigger interval of 40,000 km and 600 hours reflects the reality that heavy-duty trucks often accumulate engine hours through idling or stationary operation, making a time-based hour threshold a necessary companion to the distance-based figure.

Other Systems