The main malfunctions of hydraulic valve clearance compensators, causes and methods of elimination are given in the table.
Fault | Possible causes | Elimination Method |
• Temporary noise when starting a cold engine | Normal phenomenon | The noise disappears after the engine oil warms up and normal pressure is reached |
• Continuous noise after the engine has not been started for 48 hours | Oil leaked from the chambers of the hydraulic valve clearance compensators and air burst into them | The noise will disappear after 15 minutes of engine operation, when the engine crankshaft reaches a speed of 2000–3000 min-1
Attention Do not increase the engine speed above 3000 min-1 as this may damage the hydraulic valve clearance compensators |
• Continuous noise after starting the engine and replacing the cylinder head | Not enough oil in engine oil passages | |
• Continuous noise after prolonged engine start by starter or towing method | Oil has leaked from the chambers of the hydraulic valve clearance compensators and air has entered them | |
• Continuous noise after replacing hydraulic valve clearance compensators | ||
• Continuous noise at idle after driving at high speed | Engine oil level too low or too high | Check engine oil level |
A large amount of air is dissolved in the oil after high speed | Check the oil supply system | |
Deterioration of engine oil properties | Check the quality of the oil. | |
• Noise continues for more than 15 minutes | Low pressure in the lubrication system | Check the pressure in the lubrication system |
Faulty hydraulic valve clearance compensators | Remove the cylinder head and, by pressing on the hydraulic valve clearance compensators, check the amount of compression Attention Beware of burns from hot hydraulic valve lifters |
Valve clearance adjustment on 1.1L engines
1. Start the engine and warm up to operating temperature.
2. Remove the cylinder head cover.
3. Turn the crankshaft clockwise and set the piston in the first cylinder to top dead center at the end of the compression stroke. In this position, adjust the clearances in the valve drive in accordance with the table below.
4. Use a feeler gauge to measure the clearance between the end of the rocker arm adjusting screw and the end of the valve stem. Adjust the gap and tighten the screw locknut.
5. Rotate the crankshaft one revolution (360°) clockwise to the TDC position of the end of the compression stroke of the piston of the 4th cylinder.
Using a feeler gauge, measure the clearance between the end of the rocker arm adjusting screw and the end of the valve stem. Adjust the gap and tighten the screw locknut.