sign | Probable Cause | Elimination Method |
Low compression in the engine cylinders | Broken cylinder head gasket | Replace gasket |
Worn or damaged piston rings | Replace rings | |
Worn piston or cylinder | Repair or replace piston and/or cylinder block | |
Worn or damaged valve seat | Repair or replace valve seat and/or valve | |
Low oil pressure | Low engine oil level | Check engine oil level |
Faulty oil pressure sensor | Replace oil pressure sensor | |
Oil filter dirty | Change oil filter | |
Worn oil pump gears or cover | Replace oil pump or cap | |
Liquid motor oil | Change engine oil | |
Safety valve open | Repair safety valve | |
Increased bearing clearances | Replace bearing shells | |
High oil pressure | Safety valve closed | Repair safety valve |
Engine vibration | Engine mounts loose (front and back) | Torque motor mounts |
Transmission bracket not tightened | Torque tighten the gearbox mounting bracket | |
Underframe bracket not tightened | Torque tighten the subframe bracket | |
Center support not tightened | Torque tighten the center support | |
Gearbox mount damaged | Replace transmission mount | |
Damaged underframe support | Replace subframe support | |
Support shaft damaged | Replace support shaft | |
Valve noise | Liquid motor oil | Change engine oil |
Worn or damaged valve stem or valve guide | Replace valves or valve guides | |
Knocking in the connecting rod or main bearings of the crankshaft | Insufficient oil supply | Check engine oil level |
Liquid motor oil | Change engine oil | |
Increased bearing clearance | Replace bearing shells | |
Toothed belt noise | Incorrect toothed belt tension | Adjust toothed belt tension |
Low coolant level | Coolant leak: Corroded or cracked hoses (radiator hose, heater hose, etc.) | Replace or tighten clamps |
Faulty radiator cap valve | Replace Radiator Cap | |
Damaged thermostat housing | Replace gasket or shroud | |
Damaged radiator core | Replace | |
Faulty water pump or gasket | Replace gasket or water pump | |
Contaminated radiator pipes | Foreign matter in the coolant | Replace coolant |
High coolant temperature | Faulty thermostat | Replace thermostat |
Faulty radiator cap | Replace Radiator Cap | |
Clogged channels or hoses of the cooling system | Replace or clean clogged cooling system components | |
Loose or broken drive belt | Adjust tension or replace drive belt | |
Faulty water pump | Replace water pump | |
Faulty coolant temperature sensor | Replace coolant temperature sensor | |
Faulty electric radiator fan | Replace or repair the radiator fan | |
Faulty radiator temperature sensor | Replace radiator temperature sensor | |
Not enough coolant | Add coolant | |
Low coolant temperature | Faulty thermostat | Replace thermostat |
Faulty coolant temperature sensor or its wiring | Replace coolant temperature sensor | |
Electric radiator fan not working | Faulty coolant temperature sensor, fan motor, radiator fan relay, wiring or fuse | Replace or repair damaged items |
Exhaust gas leaks | Loose connections | Tighten connections |
Damaged pipe or muffler | Replace or repair pipe or muffler | |
Extraneous noise from the exhaust system | Muffler baffle damaged | Replace muffler |
Damaged rubber support | Replace rubber mount | |
Pipe or muffler is in contact with the body | Adjust the position of the exhaust system | |