Draining Procedure
- Place the coolant container under the radiator drain cock located at the bottom of the right radiator end tank.
- Using a flat-bladed tool, open the drain cock and drain the coolant. A small amount of coolant will drain from the system.
- Remove the surge tank cap from the surge tank and the coolant will drain from the system.
- For L61 vehicles, if the engine block needs to be drained, a drain bolt is located near the bottom of the water pump assembly.
Flushing
| IMPORTANT | Do not use a chemical flush. Store used coolant in the proper manner, such as in a used engine coolant holding tank. Do not pour used coolant down a drain. Ethylene glycol antifreeze is a very toxic chemical. Do not dispose of coolant into the sewer system or ground water. This is illegal and ecologically unsound. Various methods and equipment can be used to flush the cooling system. If special equipment is used, such as a back flusher, follow the manufacturer's instruction. Always remove the thermostat before flushing the cooling system. |
When the cooling system becomes contaminated, the cooling system should be flushed thoroughly to remove the contaminants before the engine is seriously damaged.
- Drain the cooling system. Refer to «Draining and Filling Cooling System»(ref-188798-S18526938392005090200000) .
- Remove the surge tank. Refer to «Surge Tank Replacement»(ref-188798-S22458457372005090200000) .
- Clean and flush the surge tank with clean, drinkable water.
- Install the surge tank. Refer to «Surge Tank Replacement»(ref-188798-S22458457372005090200000) .
- Follow the drain and fill procedure using only clean, drinkable water. Refer to «Draining and Filling Cooling System»(ref-188798-S18526938392005090200000) .
- Run the engine for 20 minutes.
- Stop the engine.
- Drain the cooling system. Refer to «Draining and Filling Cooling System»(ref-188798-S18526938392005090200000) in Engine Cooling.
- Repeat the procedure if necessary, until the fluid is nearly colorless.
- Fill the cooling system. Refer to «Draining and Filling Cooling System»(ref-188798-S18526938392005090200000) .