Draining, Filling and Bleeding Cooling System
Cooling System Draining, Filling and BleedingDraining
1. WARNING: When releasing the system pressure, cover the expansion tank cap with a thick cloth to prevent the possibility of coolant scalding. Failure to follow this instruction can result in personal injury.
CAUTION: When draining the engine coolant or changing any cooling system components, it is imperative that no coolant comes into contact with the timing or accessory drive belt. If necessary the belt should be removed. Contamination of the belt can result in belt failure.
CAUTION: When draining the engine coolant or changing any cooling system components, it is imperative that the coolant that is drained be refilled with the same specification of coolant. Failure to follow this instruction can result in damage to the cooling system and can cause damage to engine.
Relieve the cooling system pressure by slowly turning the expansion tank cap a quarter of a turn.
Radiator Leak Test, Removed From the Vehicle
CAUTION: Do not leak test an aluminum radiator in the same water that is used to leak test copper/brass radiators. Flux and caustic cleaners may be present in the test water which will corrode aluminum.
Clean the radiator before leak testing to prevent contamination of the test tank. Leak test the radiator in clean water with 138 kPa (20 psi) air pressure.
A separate clean test tank is recommended for aluminum radiators If a separate tank is not available for aluminum radiator testing rinse the test tank each time before testing an aluminum radiator
2. Remove the cap when all the pressure has been released.
3. With the vehicle in NEUTRAL position it on a hoist.
4. Remove the engine undershield.
5. NOTE: Drain the coolant into a suitable container.
Open the radiator drain valve to drain the coolant.
6. Close the drain valve when all the coolant has been drained from the system.
7. Install the engine undershield.
8. Lower the vehicle.
Refill
CAUTION: When draining the engine coolant or changing any cooling system components, it is imperative that the coolant that is drained be refilled with the same specification of coolant. Failure to follow this instruction can result in damage to the cooling system and can cause damage to engine.
1. Disconnect the heater supply hose from the engine.
2. Using a funnel, fill the cooling system through the supply hose until the coolant starts to trickle from the engine.
3. Reconnect the heater supply hose.
4. NOTE: Make sure that the in-vehicle heater temperature control is in the HOT position and the heater blower switch is in the OFF position. Make sure the air conditioning is switched OFF.
Refill the coolant expansion tank to the MAX mark (with the engine switched off).
5. Install the expansion tank cap.
6. Warm the engine to 2750 RPM for two fan cycles.
7. Allow the engine to cool down and then recheck the coolant level. Top off to the MAX mark as required.