Home ReviewsRefund
Home/GMC/Terrain/GMC Terrain I (2009-2015)/Repair manual/Cooling System (Mechanical)/Engine Cooling System: Maintenance
Contents Wiring diagrams Section: Cooling System (Mechanical) All sections

Engine Cooling System: Maintenance GMC Terrain I

Cooling System (Mechanical) ~1062 words

Cooling System Draining and Filling (Static LF1 or LFW)

Special Tools

J 26568 Coolant and Battery Fluid Tester

Draining Procedure

  1. Remove the coolant pressure cap from the radiator surge tank.
  2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-491131-S06536846302012073000000) .
  3. Place a drain pan under the drain cock.
  4. Loosen the radiator drain cock.
  5. Drain the cooling system.
  6. Lower the vehicle.
  7. Inspect the coolant.
  8. Follow the appropriate procedure based on the condition of the coolant. Normal in appearance-Follow the filling procedure. Discolored-Follow the flush procedure. Refer to «Flushing»(ref-491221-S40647948922012073000000) .

Cooling System Draining and Filling (GE 47716)

Special Tools

  1. J 26568 Coolant and Battery Fluid Tester
  2. J 42401 Radiator Cap and Surge Tank Test Adapter
  3. GE-47716 Vac N Fill Coolant Refill Tool
WARNINGWith 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.
  1. Remove the coolant pressure cap.
  2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-491131-S06536846302012073000000) .
  3. Place a drain pan under the drain cock.
  4. Remove the radiator drain cock.
  5. Drain the cooling system.
  6. Lower the vehicle.
  7. Inspect the coolant.
  8. Follow the appropriate procedure based on the condition of the coolant. Normal in appearance-Follow the filling procedure. Discolored-Follow the flush procedure. Refer to «Flushing»(ref-491221-S40647948922012073000000) .

Vac-N-Fill Procedure

  1. Install the J 42401 Radiator Cap and Surge Tank Test Adapter onto the coolant surge tank.
  2. Attach the Vac N Fill cap to the J 42401 Radiator Cap and Surge Tank Test Adapter.
  3. Attach the vacuum gauge assembly to the Vac N Fill cap.
  4. Attach the fill hose to the barb fitting on the vacuum gauge assembly. Ensure that the valve is closed.
  5. Pour the coolant mixture into the graduated reservoir.
  6. Place the fill hose in the graduated reservoir.
  7. Install the vacuum tank on the graduated reservoir with the fill hose routed through the cut-out area in the vacuum tank.
  8. Attach the venturi assembly to the vacuum tank.
  9. Attach a shop air hose to the venturi assembly. Ensure the valve on the venturi assembly is closed.
  10. Attach the vacuum hose to the vacuum gauge assembly and the vacuum tank.
  11. Open the valve on the venturi assembly. The vacuum gauge will begin to rise and a hissing noise will be present.
  12. Continue to draw vacuum until the needle stops rising. This should be 610-660 mm Hg (24-26 in Hg). Cooling hoses may start to collapse. This is normal due to vacuum draw.
  13. To aid in the fill process, position the graduated reservoir above the coolant fill port.
  14. Slowly open the valve on the vacuum gauge assembly. When the coolant reaches the top of the fill hose, close the valve. This will eliminate air from the fill hose.
  15. Close the valve on the venturi assembly.
  16. If there is a suspected leak in the cooling system, allow the system to stabilize under vacuum and monitor for vacuum loss. If vacuum loss is observed, refer to «Loss of Coolant»(ref-491221-S42581165502012073000000) .
  17. Open the valve on the vacuum gauge assembly. The vacuum gauge will drop as coolant is drawn into the system.
  18. Once the vacuum gauge reaches zero, close the valve on the vacuum gauge assembly and repeat steps 11-17.
  19. Detach the Vac N Fill cap from the J 42401 Radiator Cap and Surge Tank Test Adapter.
  20. Remove the J 42401 Radiator Cap and Surge Tank Test Adapter from the coolant surge tank.
  21. Add coolant to the system as necessary.
  22. Inspect the concentration of the coolant mixture using J 26568 Coolant and Battery Fluid Tester.
  23. Detach the vacuum hose from the vacuum gauge assembly.
  24. Attach the extraction hose to the vacuum hose.
  25. Open the valve on the venturi assembly to start a vacuum draw.
  26. Use the extraction hose to draw out coolant to the proper level.
  27. The vacuum tank has a drain valve on the bottom of the tank. Open the valve to drain coolant from the vacuum tank into a suitable container for disposal.
  28. Install the surge tank cap.

Cooling System Draining and Filling (Static LAF or LEA)

Special Tools

J 26568 Coolant and Battery Fluid Tester

  1. Remove the coolant pressure cap from the radiator surge tank.
  2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-491131-S06536846302012073000000) .
  3. Place a drain pan under the drain cock.
  4. Loosen the radiator drain cock.
  5. Drain the cooling system.
  6. If a complete block drain is required, place a drain pan under the water pump drain.
  7. Remove the water pump drain plug.
  8. Drain the cooling system.
  9. Inspect the coolant.
  10. Follow the appropriate procedure based on the condition of the coolant. Normal in appearance-Follow the filling procedure. Discolored-Follow the flush procedure. Refer to «Flushing»(ref-491221-S40647948922012073000000) .

Flushing

Note. 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.

  1. Drain the cooling system. Refer to «Cooling System Draining and Filling (GE 47716)»(ref-491221-S11227726582012073000000) , «Cooling System Draining and Filling (Static LF1 or LFW)»(ref-491221-S01432179932012073000000) , «Cooling System Draining and Filling (Static LAF or LEA)»(ref-491221-S24420276232012073000000) .
  2. Remove the surge tank. Refer to «Radiator Surge Tank Replacement»(ref-491221-S37187009892012073000000) .
  3. Clean and flush the surge tank with clean, drinkable water.
  4. Install the surge tank. Refer to «Radiator Surge Tank Replacement»(ref-491221-S37187009892012073000000) .
  5. Follow the drain and fill procedure using only clean, drinkable water. Refer to «Cooling System Draining and Filling (GE 47716)»(ref-491221-S11227726582012073000000) , «Cooling System Draining and Filling (Static LF1 or LFW)»(ref-491221-S01432179932012073000000) , «Cooling System Draining and Filling (Static LAF or LEA)»(ref-491221-S24420276232012073000000) .
  6. Run the engine for 20 minutes.
  7. Stop the engine.
  8. Drain the cooling system. Refer to «Cooling System Draining and Filling (GE 47716)»(ref-491221-S11227726582012073000000) , «Cooling System Draining and Filling (Static LF1 or LFW)»(ref-491221-S01432179932012073000000) , «Cooling System Draining and Filling (Static LAF or LEA)»(ref-491221-S24420276232012073000000) .
  9. Repeat the procedure if necessary, until the fluid is nearly colorless.
  10. Fill the cooling system. Refer to «Cooling System Draining and Filling (GE 47716)»(ref-491221-S11227726582012073000000) , «Cooling System Draining and Filling (Static LF1 or LFW)»(ref-491221-S01432179932012073000000) , «Cooling System Draining and Filling (Static LAF or LEA)»(ref-491221-S24420276232012073000000) .

More articles — Engine Cooling System