The gap compensator does not require maintenance. If necessary, gap compensators are checked in the following order.
Remove the cylinder head cover.
Press the rocker arm against the valve clearance compensator.
The gap compensator is then in order if it is not squeezed and when the rocker arm is pressed, there is stiff resistance.
Otherwise, the compensator is defective and needs to be replaced.
If the valve clearance compensator bulges slightly and is elastic, air has probably entered into it.
In this case, you need to check the oil level in the engine. If the level is too high, drain or suck out the oil, and if the level is too low, add oil. If the oil level is normal, check the screen and screen seal in the oil pan, replace if damaged.
Bleed the air from the valve clearance compensator by warming up the engine and driving the vehicle at low speed. Turn off the engine and wait a few minutes. Then repeat this process several times within one hour.
Hydropushers - replacement
Turn the crankshaft so that the pistons are below TDC so that when replacing the hydraulic pushers, the valves cannot hit the pistons. In some positions, the rocker arms are raised by the camshaft cams, and therefore the hydraulic tappets cannot be removed. In these cases, the crankshaft must take such a position that the rocker arms of the valves would not be raised.
fixture (1) move the valve down and remove the valve rocker with roller tappet.
Remove the hydraulic stoker from the cylinder head.
Install a new hydraulic pusher, from which air has been removed.
With the same fixture (1) lower the valve down and install the valve rocker with roller tappet.
Attention: When installing the roller rocker arm of the valve, first install its shoulder on the upper part of the hydraulic pusher, then, pressing the valve down, insert the rest of the rocker arm onto the upper end of the valve stem.