Removing
Remove the suction hose and the positive crankcase ventilation valve.
Remove the toothed belt cover.
Remove the cylinder head cover.
After loosening the bolts, remove the rocker axles.
Remove the bolts, rocker arms, springs from the axle of the rocker arms.
Checking the rocker
Check roller rotation (arrow). Replace if not smooth or worn.
Check the surface of the rockers. Replace if damaged or deformed.
Check the surface of the hydraulic tappet in contact with the valve stem. Replace hydraulic lifter if worn or damaged.
Rocker axle check
Check the rocker shafts for wear and damage. Replace if necessary.
Check the cleanliness of the oil holes in the rocker shafts. Rinse if necessary.
Checking the hydraulic pusher
Insert the air bleed wire into the hydraulic pusher hole and move the plunger up and down 4-5 times. The hydraulic tappet must be in the engine oil.
Remove the bleed wire and press the plunger with your fingers (A) And (IN).
If the plunger moves even slightly, repeat the above procedures. If the plunger moves even after multiple repetitions, replace the hydraulic tappet.
Installation
Install rocker arms (according to identification marks (A)) and springs on the rocker axles. Install the rocker shafts in the cylinder head.
Tighten the bolts of the rocker axles with the required tightening torque - 20-24 Nm
When installing axle rockers, springs, pay attention to the difference between type A and B rocker arms. Only type A rocker arms are installed on the side of the exhaust valves.
Install the cylinder head cover and tighten the bolts to the correct torque.