
The correct position of the brake pedal in the free state and pressed all the way (pedal stroke) is one of the criteria for checking the health of the brake system

To compensate for the thermal expansion of the valve, the gap between the end of the valve stem and the adjusting bolt screwed into one of the arms of the rocker arm of the valve actuator is structurally set

If you need to repair the cylinder head of the engine installed on the car, remove it ("Replacing the cylinder head gasket")