Cause of failure | Remedy |
Insufficient compression in the engine cylinders | |
Broken cylinder head gasket | Replace gasket |
Worn or damaged piston rings | Replace piston rings |
Wear of pistons or cylinders | Repair or replace pistons and/or cylinder block |
Worn or damaged valve seats | Repair or replace valves and/or valve seats |
Low oil pressure | |
Insufficient oil level | Check and, if necessary, top up the oil level |
Malfunction of the gauge of a control lamp of pressure of oil | Replace sensor |
Clogged oil filter | Replace filter |
Worn gears or oil pump cover | Replace oil pump |
Light or diluted oil | Determine the cause and change the oil |
Oil pump pressure relief valve sticking (in the open position) | Troubleshoot |
Excessive clearance between bearings and crankshaft main journals | Grind the necks and replace the liners |
Increased oil pressure | |
Oil pump pressure relief valve sticking (in closed position) | Troubleshoot |
Increased engine vibration | |
The weakening of the fastenings of the balancer bearings of the engine mount (front, rear) | Tighten fasteners |
Loose transmission mounting bracket | Same |
Loose engine mount | Same |
Loose cross member | Same |
Destruction of the elastic support of the gearbox suspension bracket | Replace support |
Destruction of the elastic support of the engine mount bracket | Same |
Destruction of a pillow of a balancing support of an engine mount | Replace pillow |
Valve noise | |
Light or diluted engine oil (low oil pressure) | Change oil |
Worn or damaged valve stems or guides | Replace valves and guide bushings |
Rattle of connecting rod bearings and/or crankshaft main bearings | |
Insufficient oil supply | Check oil level |
Light or diluted oil | Change oil and find cause |
Excessive clearance between bearings and main and/or connecting rod journals of the crankshaft | Grind the necks and replace the liners |
Timing belt noise | |
Incorrect belt tension | Adjust belt tension |
Reducing the coolant level | |
Coolant leaks: through heater or radiator hoses through a leaky radiator cap through the thermostat housing from the radiator | Repair leak or replace parts Tighten plug or replace clips Replace gasket or housing thermostat Troubleshoot or replace the radiator |
Clogged radiator | |
Foreign matter in the coolant | Change coolant |
Elevated coolant temperature | |
Thermostat failure | Replace thermostat parts |
Radiator cap failure | Replace Parts |
Reducing the capacity of the cooling system | Restore throughput or replace parts |
Loose or missing water pump drive belt | Adjust belt tension or replace belt |
Water pump malfunction | Replace pump |
Malfunction of the sensor for turning on the electric fan or its wiring | Repair or replace |
Electric fan malfunction | Repair or replace the electric fan |
Insufficient coolant level | Restore the level to normal |
Reduced coolant temperature | |
Thermostat failure | Replace thermostat |
Malfunction of the coolant temperature sensor or its wiring | Troubleshoot or replace |
Fluid leaks from the oil cooler system | |
Loose connections | Replace faulty connections |
Cracked or damaged hoses, lines, or oil cooler | Replace or repair |
Cooling fan won't turn on | |
Malfunction of the motor enable sensor, electric fan relay or wiring | Troubleshoot or replace the faulty node |
Exhaust Leak | |
Loose connections | Tighten connections |
Breakage of pipes or mufflers | Repair or replace |
Excessive exhaust system noise | |
Broken muffler plates | Replace muffler |
Broken rubber suspension parts | Replace Parts |
Contact of pipes or mufflers with the body | Eliminate touch |
Broken pipes or mufflers | Repair break or replace |