That would be true for hydraulic cams. Solid cams need to have their lash adjusted to a specified value and checked with a feeler gauge.

Another good way I've found to do valves is to adjust lash with the engine idling and the valve cover off. You loosen each valve until it becomes noisy, and then tighten them until the noise disappears. Not as scientific, but it's probably the easiest way.


52 GMC 3/4 ton pickup
68 Big Block Vette
68 455 Firebird