It's best to be careful when you adjust the valves, do them cold
and rotate the engine to the firing position for each cylinder when
you check them before you loosen and adjust them, you will find
the ones you adjusted too loose.
There are other methods that will have you do multiple cylinders and
various valves at the same time instead of the method I suggested, but
I think there is less chance to make a mistake on the adjustment my way
Wild