Cooling System Draining and Filling. Chevrolet Evaluator 1985

For 1990-2009 cars

#### Tools Required

J 26568 Coolant and Battery Fluid Tester

### Draining Procedure

Important: To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot. The cooling system will release scalding fluid and steam under pressure if radiator cap or surge tank cap is removed while the engine and radiator are still hot.

1. Unscrew the surge tank cap to remove vacuum when draining coolant.
2. Place a container under the radiator drain.
3. Unscrew the radiator drain plug until coolant flows out of the radiator drain.
4. Raise the vehicle. Refer to Lifting and Jacking Procedures in General Information.

Important: Draining at water pump will drain the heater core and some of the engine block.

5. Place a container under the water pump housing and open the water pump drain bolt.
6. Follow the appropriate procedure based on the condition of coolant.

• | Normal in appearance -- follow filling procedure.

• | Discolored -- follow flush procedure. Refer to Flushing .

### Fill Procedure

1. Close the radiator drain bolt.
2. Close the water pump drain bolt.

Tighten
Tighten the bolt to 10 N·m (88 lb in).

3. Lower the vehicle.
4. Vehicle should be level.
5. Add a mixture of 50/50 DEX-COOL® antifreeze and clean drinkable water until the level stabilizes at the weld seam on the surge tank. Refer to Approximate Fluid Capacities in General Information.
6. Install the surge tank cap.

Important: DO NOT exceed 2,200 RPM.

7. Start the engine and run at 2,000 RPM until the engine cooling fans turn on.
8. Remove the surge tank cap.
9. Refill to the weld seam on the surge tank.

Important: Coolant should be at the full cold mark when the system cools.

10. Install the surge tank cap.
11. Inspect the concentration of engine coolant using J 26568 .
12. Rinse away any excess coolant from the engine and the engine compartment.