help rocker ajustment

j par said

Did the valve ajust as per (69 340 GTS) valve lash ajusting chart. Then for a double check - checked a couple of valves as per my machine shop and the comp cam video provided by (DDodger). Every one was .002. - .003 loose ??? That kind of defies all logic? So, we kept going through the second processed and called it good.

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Cam lobes are not perfect. The lash closes when hot on Iron heads. When you adjust your lash using the methods above, the lobe may or may not be at the lowest point of the base circle. If you adjust them as above and rotate the crank every 10 to 15 degrees rechecking the lash on all the rockers you can, you will find that you will be adjusting the lash on quite a few rockers. This is why we do the final adjustment to the lash hot and running. Readjust after 5,000 miles after break in. Then you should be good for years.