Check and adjustment of backlashes of valves on engines of 1.8 and 2.0 liters (MLA)

Check and adjustment of backlashes of valves spend the engine is cold (coolant temperature 21 ?� C) and a cylinder head mounted on the cylinder block.

Remove the engine cover.

Remove the cover from the oil filler cap.

3. Remove the screws and remove the central cover.

Remove the top casing of a gear belt. Remove the mounting bolts of the upper toothed belt and remove it.

5. Remove the cylinder head cover.
1. Disconnect the high-voltage wires, it does not apply to them considerable effort.
2. Disconnect the hose from the cylinder head crankcase ventilation.
3. Disconnect the cylinder head accelerator cable.
4. Remove the cover bolts and remove the cylinder head cover and the gasket.

At applying significant effort or bending of high-voltage wires may damage the central core wire.

Set the piston in the first cylinder to the top dead center in the compression stroke. Turn the crankshaft clockwise and align the notch on the pulley with the mark ?�T?� on the bottom casing of a gear belt.

b. Check that the hole on the camshaft pulley is aligned with the mark on the bearing cover, otherwise, turn the crankshaft one revolution (360 ?�).

7. Check valve clearances.
1. Check valve clearances only shown in the figure (the piston in the first cylinder is set to TDC in the compression stroke).

• Feeler gauge, measure the clearance between the shim and the base of the pusher cam camshaft.
• Record the measured gap. This value is necessary to calculate the Buda required thickness of the shim.

Valve clearance (coolant temperature 20 ?� C):

- Inlet valves: 0.20 mm;
- Exhaust valves: 0.28 mm.

Valve clearance (coolant temperature 80 ?� C):

- Inlet valves: 0.29 mm;
- Exhaust valves: 0.34 mm.

Maximum permissible valve clearance:

- Inlet valves: 0,12-0,28 mm;
- Exhaust valves: 0,20-0,36 mm.

b. Rotate the crankshaft one revolution (360 ?�) clockwise and align the notch on the pulley with the mark ?�T?� on the bottom casing of a gear belt.

c. Check valve clearances only shown in the figure (the piston in the first cylinder is set to TDC in the compression stroke).

• Feeler gauge, measure the clearance between the shim and the base of the pusher cam camshaft.
• Record the measured gap. This value will be required to calculate the required thickness of the shim.

Adjust clearance intake and exhaust valves. Rotate the crankshaft so that the contour of the cam on the camshaft adjustable valve facing up.

b. Special tools (09 220 - 2D000) Click on the valve lifter, insert the stopper between the camshaft and the pusher and remove the special tool.

c. Or a small screwdriver, remove the magnet shim.

d. Micrometer, measure the thickness of the removed shim.
e. Calculate the new thickness of the shim so that the valve clearance is within a predetermined value.

Valve clearance (coolant temperature 20 ?� C)

T: Thickness of removed shim
A: Measured valve clearance
N: The thickness of the new shim
The intake valves: N T = (A - 0.20 mm)
The exhaust valves: N = T (A - 0.28 mm)

f. Select a new shim with thickness closest to the calculated value.

As the parts are supplied shims 20 sizes with a thickness of 2.00 mm to 2.76 mm and a pitch of 0.04 mm.

g. Install the new shim to the valve tappet.
h. Special tools (09 220 - 2D000) Click on the valve lifter and remove the stopper.
i. Recheck the valve clearance.

Valve clearance (coolant temperature 20 ?� C):

- Inlet valves: 0.20 mm;
- Exhaust valves: 0.28 mm.

Maximum permissible valve clearance:

- Inlet valves: 0,17-0,23 mm;
- Exhaust valves: 0.25-0.31 mm.