ATTENTION: This operation applies to engines that do not have valve lifters.
Start the engine and warm it up to a coolant temperature of 80-95°C.
Remove all spark plugs.
Remove the cylinder head cover.
Turn the crankshaft clockwise until the mark on the pulley aligns with the mark «T» scales on the bottom cover of the camshaft timing belt.
Shake the rocker arms of the valves of the 1st and 4th cylinders to determine in which cylinder the piston is at TDC of the compression stroke, if there is a gap between the rocker arms of the valves of one of the cylinders, the piston of this cylinder is at TDC of the compression stroke.
If the piston of the 1st cylinder is at the TDC of the compression stroke, check and adjust the clearances in the valve drive, shown in the figure with a white arrow; if the piston of the 4th cylinder is at the TDC of the compression stroke, the adjustment is made on the rocker arms shown in the figure with a black arrow.
Measure the valve clearance. If the clearance does not meet the required values, then loosen the locknut of the rocker arm adjusting bolt and adjust the clearance by measuring it with a feeler gauge and turning the adjusting bolt.
Required clearance (hot engine): inlet valve 0.20mm, outlet valve 0.30mm.
Rotate the crankshaft 360°until the mark on the pulley matches the mark «T» on the scale of the lower camshaft belt cover. Make adjustments to the clearances in the drive of the remaining valves, as indicated earlier.