The gap is measured with a feeler gauge on a cold engine (at +20°C) between the camshaft cam (the cam must be pointing up from the pusher) and adjusting washer of the valve lifter. The nominal clearance for the intake valve is (0,2+0,05) mm, for graduation - (0,35+0,05) mm. The gaps are adjusted by selecting the thickness of the valve shims. Spare parts are supplied with valve shims with a thickness of 3 to 4.5 mm through 0.05 mm.
Counting from the timing belt, the 1st, 4th, 5th and 8th valves are exhaust, the 2nd, 3rd, 6th and 7th are inlet.
The order in which the valve clearances are adjusted does not matter.
To adjust the clearances in the valve drive on a car, you will need: a valve spring compressor, a set of flat feelers, tweezers, a spanner wrench «at 17» (or end head) to rotate the crankshaft.
1. Remove the engine mudguard (see «Removal and installation of a mudguard of the engine»), to gain access to the crankshaft pulley bolt.
2. Remove the cylinder head cover (see «Replacing the cylinder head cover gasket»).
3. Use a set of feeler gauges to measure the clearances in the drive of those valves whose cams are directed upwards from the pushers (in this case, these are the 4th, 6th, 7th and 8th valves). It is necessary to replace the adjusting washers of those valves, the gaps in which differ from the nominal value. Record the measured valve clearances.
4. In order to make it easier to remove the valve adjusting washer, two grooves are made in the pusher. Use a screwdriver to turn the pusher by the groove so that it is convenient to pry off the valve adjusting washer. For ease of operation, remove oil from the top of the cylinder head (around pushers).
5. Install a special device for compressing valve springs on the studs of the head cover and secure it with the cover fastening nuts.
6. Pressing the tool lever down, sink the pusher on which the adjusting washer is being replaced, and insert the retainer under the camshaft so that...
7.... the protrusion on the latch 1 fixed the pusher 2 in the recessed position.
8. Pry off the valve adjusting washer with a screwdriver and use, for example, tweezers, remove it from the pusher.
9. Write down the thickness of the shim, which is marked on one side of the shim. If the inscription is not visible, measure the thickness of the washer with a micrometer.
10. Calculate the thickness H new shim according to the formula (all values in mm)
H \u003d B + A - C,
where B is the thickness of the old valve washer;
A is the value of the measured valve clearance;
C is the nominal clearance of the valve.
For example (for intake valve): H = 3.75 mm; A = 0.26 mm; C = 0.2 mm. Then H \u003d 3.75 + 0.26-0.2 \u003d 3.81 (mm). Within clearance tolerance (±0.05 mm) we select the washer closest in thickness - 3.8 mm.
11. Install a new washer in the pusher, the thickness of which is calculated according to the formula, with the inscription down (to the pusher). Drown the pusher with a tool and remove the retainer.
12. Check the clearance with a feeler gauge. If it differs from the nominal value, repeat the valve adjustment.
13. Turn the crankshaft one turn (360°) and adjust the clearances in the drive of the 1st, 2nd, 3rd and 5th valves in the same order. Then pour oil into the top of the block head if it was removed.
14. Check up a condition of a lining of a cover of a head of the block of cylinders, if necessary replace it.
15. Establish on the car all removed details in an order, the return to removal.