Contents: 21 There is insufficient engine… ↧ 22 There is excessive engine cooling ↧ 23 There is an external coolant leak ↧ 24 There is an internal coolant leak ↧ 25 A drop in coolant level is noted ↧ 26 There is insufficient circulation… ↧
21 There is insufficient engine cooling
1. Low coolant level in the system (chapter 1).
2. Incorrect adjustment or damage to the drive belt of the cooling system pump (chapter 1).
3. The radiator cells are clogged or its grille is blocked (chapter 3).
4. Thermostat malfunction (chapter 3).
5. Destruction or bending of the radiator fan impeller blades (chapter 3).
6. Inability of the expansion tank cap to maintain the required pressure in the system. Check the cover control pressure by contacting the station.
7. Radiator fan circuit malfunction (chapter 3).
22 There is excessive engine cooling
1. Thermostat malfunction (chapter 3).
2. Malfunction of the coolant temperature sensor (chapter 12).
3. Radiator fan circuit malfunction (chapter 3).
23 There is an external coolant leak
1. Damaged or destroyed hose. The hose clamps are loose. Replace the hose and/or tighten the clamps (Chapter 1).
2. Failure of the cooling system pump seals. In this case, the coolant will flow out of the drain hole in the pump housing (chapter 3).
3. Fluid leaking through the radiator or side tank. To restore it, you need to contact a radiator repair shop (the removal procedure is described in chapter 3).
4. Leak from the drain plug or cooling jacket cap (chapter 2B).
5. Leak through the heater heat exchanger. Signs of such a leak may be found on the carpet of the car interior (chapter 3).
24 There is an internal coolant leak
Note: An internal coolant leak is usually detected by inspecting the engine oil. Make sure there are no drops of liquid or oil emulsion on the dipstick or the inner surface of the valve cover.
1. Cylinder head gasket leaking. Measure the operating pressure in the cooling system.
2. Crack in the cylinder surface or cylinder head. Remove the cylinder head and inspect (chapter 2).
25 A drop in coolant level is noted
1. Exceeding the permissible level of liquid in the expansion tank (chapter 1).
2. Liquid boils away due to engine overheating (see subsection 15).
3. There is an internal or external fluid leak (see subsection 23 and 24).
4. Failure of the radiator cap. Check the working pressure of the cover.
26 There is insufficient circulation of coolant
1. Failure of the cooling system pump. To perform a quick check with the engine idling, squeeze the upper radiator hose with your hand and then release it quickly. If the pump is working properly, you should hear a splash of coolant (chapter 1).
2. Clogged cooling system channels, Drain the liquid, flush the system and fill it again (chapter 1). If necessary, remove the radiator (Chapter 3) and perform counter-current flushing.
3. Failure of the drive belt or tensioner (chapter 1).
4. Thermostat jammed (chapter 3).