24. SERVICE PROCEDURE 9. When the water comes to near the water filler port, open drain plug @ and drain plug 0, run the engine at low idling, and continue to run water through the system until clean water comes out. Adjust the flow of the water flowing in and draining out to ensure that the radiator is always full during the flushing operation. 10. When the water is completely clean, stop the engine, then close drain valve @ and drain plug 0. 11. Replace the corrosion resistor. For details of the procedure for replacing the corrosion resistor, see “24.7 EVERY 1000 HOURS SERVICE”. 12. Add tap water until the water flows out from the water filler port. 13.
To remove the air in the coolant, run the engine for 5 minutes at low idling, then run for a further 5 minutes at high idling. (When doing this, leave the water filler cap off.) 14. Stop the engine, wait for 3 minutes, add tap water until the water level reaches near the water filler port, then tighten the cap. 3-25