Note. Valve clearances should be checked after removal and installation of camshafts, valve components, as well as symptoms indicating a violation of the gaps (e.g. at high mileage).
1. Warm up the engine and turn it off.
2. Remove the locker of the right front wheel arch (see chapter Body) and cylinder head cover (see Section Removal and installation of a cover of a head of cylinders).
3. Turn the crankshaft pulley clockwise until the mark (2) TDC on the pulley coincided with the indicator (1) TDC on the front cover of the cylinder block.
4. Working projections of all cams (2 for intake and 2 for exhaust) valve actuators first cylinder must face outwards (as an extension of the valve axis). Otherwise, turn the crankshaft pulley one more turn.
5. Using a blade-type feeler gauge, measure the clearances between the cams and the corresponding valve lifters shown in the illustration. Record the results and turn the crankshaft pulley one more turn. Measure remaining valve clearances.
6. Compare the received data with the requirements Specifications (for warm engine) and, if necessary, adjust the valve clearances as described below.
7. Valve clearances are adjusted by selecting valve lifters. Adjustment of valve clearances, as well as measurement of the thickness of the working wall of the pushers, should be carried out with a warm engine.
8. Remove the corresponding camshaft (see Section Removal, check and installation of camshafts) and remove the appropriate pushers.
9. Measure the thickness of the middle part of the working wall of the pusher with a micrometer and write down the value obtained.
10. To calculate the thickness of the working wall of the required pusher, add the measured valve clearance to the measured thickness of the working wall of the old pusher and subtract the standard valve clearance from the result (see Specifications).
11. The thickness of the working wall of the pusher can be identified by a two-digit numerical mark stamped on the inside of the working wall. The mark means hundredths of a wall thickness of 3 mm, for example, the mark «04» corresponds to a wall thickness of 3.04 mm. Valve lifters are available with working wall thickness from 3.00 to 3.68 mm in 0.02 mm increments.
12. Install the selected pusher and camshaft.
13. Turn the crankshaft by hand a few turns and measure the valve clearance (with a cold engine). Adjust it again if necessary.
14. After completing the adjustment, make sure that the valve clearances meet the requirements Specifications when the engine is warm.