The engine gets very hot
1. Insufficient coolant level in the cooling system. By inspection, determine the location of the leak, eliminate the leak and bring the fluid level to normal (see "Checking the technical condition of the cooling system").
2. The engine cooling system radiator is clogged. Blow out the radiator with compressed air or a jet of water from the engine compartment.
3. The valves in the expansion tank cap of the cooling system are faulty (see "Cooling system"). Replace the faulty cover.
4. Thermostat is faulty. Check the technical condition of the cooling system (see "Checking the technical condition of the cooling system"). Remove and check the thermostat, replace if faulty (see "Thermostat - replacement").
5. The electric fan of the engine cooling system is faulty. Check the technical condition of the cooling system. Check the electric fan, replace if faulty (see "Electric cooling fan - removal, inspection and replacement").
6. The cooling system pump is faulty. Remove and replace the coolant pump (see "Coolant Pump - Replacement").
Glow ignition
Note: Pre-ignition is the premature self-ignition of the working mixture from a hot substance (for example, carbon deposits formed in the combustion chamber) or from overheated (more than 700-800°C) parts - spark plugs, exhaust valves, etc.
1. High engine crankshaft speed at idle. Perform diagnostics of the engine management system (see "Checking the technical condition of the engine management system"). If necessary, update the ECU software ("reflash"). Check and, if necessary, replace the throttle assembly (see "Throttle assembly - removal, gasket replacement and installation").
2. Engine overheating. Check the coolant temperature gauge on the instrument cluster and, if the engine is indeed overheating, correct the cause of the overheating (see "Cooling system").
3. Using spark plugs with the wrong heat rating. Replace spark plugs (see "Spark plugs - replacement").
4. Carbon deposits on valves and in engine combustion chambers (frequent short distance travel). For self-cleaning, a long drive on the motorway at a speed of at least 90 km/h is necessary. As a preventive measure against carbon deposits, it is advisable to use the car more often on free country roads.
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