Adjusting the Valve Sync

If you have done a valve job, replaced your valves, or just want to be sure each pair of valves are operating in exact unison, you'll need to adjust the valve 'sync'. Here's how I did mine:

Note: Since the pushrods are not yet installed, all valves are seated and rockers are not yet under tension. Therefore, there is no need to worry about rotating the engine to TDC. All valves can be sync-ed without stopping to release rocker/valve pressure.

Loosen the valve 'sync' nut (on the rocker-arm) using a 10mm wrench. Then put a 4 or 5mm (tiny) socket on the sync bolt (You don't need a wrench on the socket. Just hold it with your fingers). Now, while holding the non-adjustable rocker arm against its valve stem, play with the 4 or 5mm socket to find the point where the sync bolt-face lightly kisses its valve stem. Then lock the 'sync' lock-nut with a 10mm open-end wrench.

Note: I used a dial indicator, ala Mr. Tidy article on valve syncing in this website, to see where the sync-bolt 'kissed' its valve stem. I found it to be a little more precise than my finger sensitivity.