Order of execution
Attention! Check and adjust valve clearances on a cold engine (coolant temperature 21°C) and the cylinder head mounted on the cylinder block.
1. Remove the shroud from the engine.
2. Remove the cap from the oil filler neck.
3. Turn out screws and remove the central cover.
4. Remove the top casing of a gear belt.
- Turn out bolts of fastening of the top casing of a gear belt and remove it.
5. Remove the cylinder head cover.
- Disconnect the high-voltage wires, but do not apply much force to them.
- Disconnect the crankcase ventilation hose from the cylinder head.
- Disconnect the accelerator cable from the cylinder head.
- Turn out bolts of fastening of a cover of a head of cylinders and remove a cover and a lining.
Attention! When applying significant force or bending high-voltage wires, damage to the central core of the wire may occur.
6. Set the piston in the first cylinder to top dead center on the compression stroke.
- Turn the crankshaft clockwise and align the groove on the pulley with the mark «T» on the lower timing belt cover.
- Check that the hole on the camshaft pulley is aligned with the mark on the bearing cap, otherwise turn the crankshaft one turn (360°).
7. Check valve clearances.
- a. Check only the valve clearances shown in the figure (The piston in the first cylinder is at TDC on the compression stroke).
- Use a feeler gauge to measure the clearance between the tappet shim and the camshaft cam base.
- Write down the value of the measured clearance. This value will be needed to calculate the required shim thickness.
valve clearance (coolant temperature 20°C):
- intake valves: 0.20 mm;
- exhaust valves: 0.28 mm.
valve clearance (coolant temperature 80°C):
- intake valves: 0.29 mm;
- exhaust valves: 0.34 mm.
Maximum allowable valve clearance:
- intake valves: 0.12–0.28 mm;
- exhaust valves: 0.20–0.36 mm.
- b. Rotate the crankshaft one revolution (360°) clockwise and align the groove on the pulley with the mark «T» on the lower timing belt cover.
- c. Check only the valve clearances shown in the figure (The piston in the first cylinder is at TDC on the compression stroke).
- Use a feeler gauge to measure the clearance between the tappet shim and the camshaft cam base.
- Write down the value of the measured gap. This value will be needed to calculate the required shim thickness.
8. Adjust the intake and exhaust valve clearances.
- a. Rotate the crankshaft so that the camshaft lobe contour on the adjustable valve points up.
- b. special tool (09220 - 2D000) press the valve tappet, insert the stopper between the camshaft and the tappet and remove the special tool.
- c. Use a small screwdriver or magnet to remove the shim.
- d. Use a micrometer to measure the thickness of the removed shim.
- e. Calculate the thickness of the new shim so that the valve clearance is within the specified value.
valve clearance (coolant temperature 20°C)
- T: Thickness of removed shim
- A: Measured valve clearance
- N: Thickness of the new shim
Inlet valves: N=T (A - 0.20 mm)
Exhaust valves: N=T (A - 0.28 mm)
- f. Select a new shim with a thickness closest to the calculated value.
Attention! As spare parts, shims are available in 20 sizes with a thickness ranging from 2.00 mm to 2.76 mm in 0.04 mm increments.
- g. Install a new shim on the valve lifter.
- h. special tool (09220 - 2D000) press the valve lifter and remove the stopper.
- i. Recheck the valve clearance.
valve clearance (coolant temperature 20°C):
- intake valves: 0.20 mm;
- exhaust valves: 0.28 mm.
Maximum allowable valve clearance:
- intake valves: 0.17–0.23 mm;
- exhaust valves: 0.25–0.31 mm.