Cooling System Draining and Filling LTD/U20XE, LE5/U24XE

Warning: With a pressurized cooling system, the coolant temperature in the radiator can be considerably higher than the boiling point of the solution at atmospheric pressure. Removal of the surge tank cap, while the cooling system is hot and under high pressure, causes the solution to boil instantaneously with explosive force. This will cause the solution to spew out over the engine, the fenders, and the person removing the cap. Serious bodily injury may result.

Warning: In order to avoid personal injury, do not remove the cap or open the cooling system drains from a hot system. Allow the system to cool first.

Procedure

1. Vehicles with air condition: switch air conditioning off.
2. Open cooling system. Unscrew coolant surge tank cap.



3. Open the vent screw (1) on the radiator.



4. Disconnect the engine feeding hose on the engine side.
5. Insert a hose (2) with a funnel (1) in the opening of the engine and top up with coolant.
6. Insert a funnel into the feeding hose and top up with coolant.




Note: Close vent screw when coolant flows out on the loosen vent screw.

7. Close the vent screw (1) on the radiator and the thermostat housing.
8. Install the feeding hose.



9. At first top up coolant until cold level of the coolant expansion tank. When the coolant has stopped dropping top up the coolant until the bottom line of the down pipe hole.
10. Cap the cooling system screw in coolant surge tank cap.

Note: After removing the heater core (located in passenger room) the following Additional work has to be done: Immediately after the engine starts kick the accelerator pedal 3 times - thereby the engine speed should not exceed 2500 rpm.

11. Start and warm up the engine. Warm up the engine at idle speed up to 2500 rpm until first radiator fan setting switches on.

Note: After removing the heater core (located in passenger room) let the engine run for 2 minutes at 2000 to 2500 rpm. This ensures complete venting of the cooling system.

12. Vent cooling system. Kick the accelerator pedal 3 times - thereby the engine speed shoud not exceed 2500 rpm.
13. Switch the engine off and let the engine cool down.




Note:  After a test drive, let the engine cool down and check the coolant level again. Adjust the coolant level to "COLD" mark if necessary.

14. Check coolant level and correct the coolant to "COLD" mark if necessary.