Truck and Bus Engine and Ancillaries

Cooling System Parts

Radiators, charge air coolers, water pumps, thermostats, viscous fan drives, expansion tanks, coolant pipes and complete hose sets.

Features

  • Charge air cooler leaks cost fuel and raise exhaust temperature long before a warning appears, so they are pressure tested at service.
  • Viscous fan drives and electronically controlled fan clutches fail gradually, showing as high coolant temperature only under load.
  • Hose sets are replaced together on high-hour vehicles, because one new hose among ten old ones only moves the next failure along.
  • Radiator cap and expansion tank condition set system pressure and therefore boiling point; both are cheap and often overlooked.
  • Coolant specification is part of the repair: mixing inhibitor packages causes gelling and blocks the cooler cores.

Specifications

Figure Typical range Unit Why it matters
Component radiator / charge air cooler / water pump / thermostat / hose Identifies the line.
Core dimensions 900 x 780 x 52 mm Fit in the cooling pack.
Thermostat opening temperature 83 / 87 / 90 °C Must follow the engine specification.
Hose inside diameter 32 - 100 mm Sealing on the existing spigots.