How to adjust the valve of Citroen Sega?

Citroen Sega valve adjustment is as follows:

1. When adjusting the valve, pay attention to the adjustment sequence and the size of the gap. The valve clearance is determined by the engine manufacturer through relevant tests, and cannot be too large or too small.

2. The valve clearance is too small, which may lead to air leakage when the car is hot and reduce the engine performance; If the valve clearance is too large, the valve will collide with the valve seat, which will aggravate the wear.