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Troubleshooting System Cooling

The engine gets very hot

Broken or slipping water pump drive belt. Check (see. Accompanying illustration), adjust or replace the belt.

Fell coolant level. Try to find out the cause of the fluid loss. It may be a fracture, external or internal leakage - please refer to the appropriate subsection below.

In no case do not remove the cap from the radiator on the hot engine. Wait until the cooling of the engine, and then wrap the cover of a thick layer of rags and slowly begin to turn on her. When he reached the first stop and wait for pressure relief, and only then can completely remove the lid.

Defective radiator cap. Check (see. Accompanying illustration), replace.

Disrupted the passage of air from the front to the back of the radiator core. Purge the path from the rear side of the heat exchanger the compressed air bleed or its water supplied under pressure. Faulty thermostat. Check, if necessary replace.

Faulty thermostatic clutch cooling fan. Replace the clutch.

Broken coolant circulation. Check, make the necessary corrections.

Broken ignition timing. Check to make adjustments.

Broken cross-exhaust system. Eliminate the cause of the blockage or replace the faulty section / component.

Broken layout structure of an air-fuel mixture. Check as described in the section on troubleshooting the power system), if necessary, make appropriate corrections.

Fell level of motor oil. Immediately stop the engine and add oil to the required level.

Disturbed regulation of brake mechanism "is stuck" brake. Check, make the necessary adjustments or replacement of components (see. The corresponding sub-sections devoted to troubleshooting the braking system).

To slip clutch. Check perform the necessary repairs.

Have the leak through the cylinder head gasket. Check, perform the necessary repairs.

The engine is not designed renovated. Make sure not to overtighten if overly corresponding fixture. Stop the engine and let it cool.

Engine overheating is usually accompanied by the emission of steam from the engine compartment. A characteristic feature of leakage of the cylinder head gasket is bubbling coolant when the engine is running (see. Accompanying illustration).

We have the external coolant leaks

Hose clamp is loose or faulty hose (cm. Accompanying illustration). Tighten the clamp or replace the defective hose.

There have been leaks from the radiator heat exchanger, or a cistern. Carry out the necessary repair or replace the radiator.

Worn or damaged bearing and / or the water pump oil seal. Replace the pump.

Loose or damaged radiator drain plug. Tighten or replace plug.

We have the exterior cracks in the block or cylinder head. Replace defective components.

There have been leaks from the thermostat housing and the water pump. Replace the faulty component.

There have been leaks from the heater exchanger or through his cock. Carry out the necessary repair or replace the faulty component.

To identify signs of external coolant leaks park the car on a clean, dry area and warm up the engine to normal operating temperature. Also check for signs of moisture in the car heater for heat exchanger.

We have the internal coolant leak

Leakage at the cylinder head gasket as a consequence of violations of the flatness of the mating surfaces (either or both) or the cylinder head. Check pierce or replace the defective component (head / flow). Replace the gasket.

There have been cracks in the head or cylinder block. Replace the faulty component.

In order to detect signs of internal coolant leaks, remove the dipstick and check the motor oil the blade for signs of oil foaming. Start the engine and watch the exhaust. Excessive emission indicates the presence of vapor coolant combustors. Check the compression pressure (see. The appropriate section in Chapter Settings and maintenance) to identify the defective cylinder.

He has been a violation of the circulation of the coolant

Tension adjustment is broken or faulty drive belt (s) water pump. Adjust tension or replace the belt (s).

Fell the coolant level in the system. Top up, make a system check for leaks.

There was a partial violation of patency of the heat exchanger tubes of the radiator. Make obratnopotochnuyu wash or replace the radiator.

There is an excessive deposition of scale in the water channels of the engine. Make obratnopotochnuyu washing cylinder.

Faulty thermostat. Check, if necessary, replace.

There has been a collapse of radiator hoses. Check, replace defective hoses.

Faulty water pump. Replace.

Violation of circulation is easiest checked by removing the cover from the radiator and monitoring of fluid turbulence after warming up the engine to normal operating temperature. At serviceable system turbulence should occur in the partial opening of the throttle valve. Under the most adverse conditions when attaching multiple disorders, diagnosis can be made by eliminating the healthy components during successive checks are performed in this order.