Withdrawal
1. Disconnect the crankcase ventilation hose.
2. Remove the water pump pulley and crankshaft.
3. Remove a casing of a gear belt.
4. Remove the toothed belt tension roller and temporarily fix it in this position.
5. Remove the toothed belt from the camshaft pulley.
6. Turn out screws and remove the central cover.
7. Remove the block of ignition coils.
8. Turn out bolts and remove a cover of a head of cylinders.
9. Remove the camshaft pulley.
10. Remove the camshaft bearing caps and drive chain.
11. Remove camshafts.
12. Remove the hydraulic valve clearance compensators.
Examination
Camshafts
1. Check the camshaft for uneven wear, cracks or damage.
2. At two points, measure the height of each camshaft lobe.
- Nominal height of intake camshaft lobes: 43.4484 mm
- Nominal height of camshaft camshafts of exhaust valves: 43.8489 mm
- Minimum allowable height of the intake camshaft cams: 42.9484 mm
- Minimum allowable exhaust camshaft height: 43.3489 mm
3. Check the cam surfaces for uneven wear and damage.
4. Check each bearing for damage. If the bearing surface is excessively damaged, replace the cylinder head or camshaft bearing cap.
Camshaft end play: 0.1–0.2 mm
Camshaft front O-ring
1. Check the sealing ring lips for wear. If the lip is worn or damaged, replace the O-ring.
2. Check the surface of the camshaft in contact with the O-ring. If this surface is unevenly worn, replace the camshaft.
Hydraulic valve clearance compensators
Fill the hydraulic valve clearance adjuster with engine oil, hold it vertically and squeeze it on both sides with your fingers.
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 has leaked from the chambers of the hydraulic valve clearance compensators and air has entered 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 |
Chain
Check the chain bushings and plates for uneven wear, cracks or damage and replace if necessary.
Installation
1. Install hydraulic valve clearance compensators.
2. Install the chain on the camshaft sprockets, aligning the chain marks with the marks on the camshaft sprockets as shown.
3. Before installing, apply a thin layer of clean engine oil to all sliding surfaces of the camshafts. Install the camshafts.
4. Install the camshaft bearing caps. Check the identification marks identifying the intake or exhaust camshafts.
- Intake camshaft: I
- Exhaust camshaft: E
5. Tighten the bearing cap bolts to the required torque. Tightening torque: 12–14 Nm
6. Lubricate with engine oil the working edges and the outer surface of the sealing ring and with a special tool 09221–21000 install the sealing ring on the front of the camshaft.
By blows of a hammer on a special device, install the sealing ring until it stops in the socket.
7. Install the camshaft pulley and secure it with a bolt.
Tightening torque: 80–100 Nm
8. Align the timing mark of the camshaft and the timing mark of the crankshaft pulley with the pointers, while the piston of the 1st cylinder will be at TDC on the compression stroke.
9. Establish a cover of a head of cylinders and tighten bolts of fastening of a cover the demanded moment.
Tightening torque: 8–10 Nm
10. Install high voltage wires, ignition coils and center cover.
11 Install the toothed belt and tighten the toothed belt tensioner.
12. Establish casings of a gear belt.
Tightening torque: 8–10 Nm
13. Install the water pump pulley and crankshaft.