Series 55 – Section 4.6 Radiator

Section 4.6
Radiator

The radiator is an OEM supplied component.‪

Section 4.6.1
Repair or Replacement of Radiator

If you determine that your radiator is plugged, use the following procedure to reverse flush it:‪

To avoid injury from the expulsion of hot coolant, never remove the cooling system pressure cap while the engine is at operating temperature. Remove the cap slowly to relieve pressure. Wear adequate protective clothing (face shield or safety goggles, rubber gloves, apron, and boots).‪

1. Remove cooling system scale by using a descaling solvent. Follow the manufacturer's instructions.
2. Drain the cooling system. Refer to "13.4.4 Cooling System" .
3. Remove the radiator inlet and outlet hoses.
4. Remove the water pump inlet and outlet hoses.
5. Attach a hose to the top of the radiator to lead water away from the engine.
6. Attach a hose to the bottom of the radiator and insert a flushing gun in the hose.
7. Connect the gun's water hose to the water outlet and the air hose to the compressed air outlet.

   NOTICE:
   Apply air gradually. Do not exert more than 138 kPa (20 lb/in.2 ) air pressure. Excessive pressure may rupture a radiator tube.‪

8. Turn on the water. When the radiator is full, turn on the air in short blasts, allowing the radiator to fill between blasts.
9. Continue flushing until only clean water is expelled form the radiator.
10. Remove flushing gun and hoses from the radiator.
11. Attach the water pump inlet and outlet hoses.
12. Attach the radiator inlet and outlet hoses.
13. Fill cooling system. Refer to "13.4.4 Cooling System" .