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Originally Posted by krautman
pull the valve covers and be sure that the return holes for the oil are not all plugged up, this is a real concern. if all is clear, check for a loose rocker by following the firing order 1-8-4-3-6-5-7-2. when the valves are closed you try to turn the pushrod with your fingertips, if you can, tighten the rocker 3/4 turn (i like to use a 1/2 turn) AFTER THE INITIAL FRICTION of the rocker and pushrod, this is the method i have used for years and have never had a problem. if you have to change the lifter it is easy and they are cheap. buy a whole set of lifters and pushrods, it is easier than doing it again. summit racing sells them as a whole set, cheap as well as advance auto parts, i dont like the autozone stuff myself but it is available.
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You failed to point out that if adjusting valves statically as you describe that you adjust them while on the heel of the cam.
The easiest and quickest, however the messiest, way to do this is to pull off one valve cover and with the engine idling simply back off each rocker arm nut until it starts clacking then turn it back in 1/2 turn. Don't use a ratchet because it will take longer because of changing ratchet direction. Use a breaker bar, short extension and socket. Then reinstall that valve cover and do it on the other side.
After that change oil hot and often for awhile to get everything cleaned out.
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