Turn the crankshaft so that the piston of the 1st cylinder, counting from the drive side of the gas distribution mechanism, takes the TDC position of the end of the compression stroke; in this case, the mark on the crankshaft pulley should be opposite the mark on the camshaft drive cover, and the ends of the pushers should have the backs of both cams of the 4th cylinder.
In this position, use a set of feeler gauges to measure the gap between the rocker arm and the end of the stem of the intake valves of the 1st and 2nd cylinders and the exhaust valves of the 1st and 3rd cylinders, proceeding as follows:
- by rotating the self-locking rocker nut, achieve the required clearance, while the probe should enter with. slight pinching
- rotate the crankshaft a full turn and adjust the clearance of the inlet valves of the 3rd and 4th cylinders and the exhaust valves of the 2nd and 4th cylinders, as indicated above.
Clearances in the valve drive mechanism The normal clearance between the rocker arm and the end of the valve stem, measured with a feeler gauge on a hot engine, is 0.15 mm for intake valves and 0.25 mm for exhaust valves.
Note. Cranking of the crankshaft of the engine is carried out by moving the car with the IV gear engaged.
Valve clearances can be adjusted while the engine is running warm. using a cardboard pad to protect against oil splashes.
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