The ideal way is not to have the spring and valve rotate while doing the adjustment. That is what the third wrench is for. Reason being is the valve rotator beneath the spring could be worn and not able to spin the valve causing an uneven wear on the valve seat and stem. Once you rotate the valve, you disturb the position where it was wearing down on and the valve will not seat correctly. This valve seat wear could cause the adjustment to be used up.

Also the not so drastic, what stretch said above..^^^
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1983 123.133 California
- GreaseCar Veg System