adjusting valves/ stud mount?? PKRWUD? Anyone??

Just wanted to thank you again for your help Chris. The valve adjusting went smoothly, the ticking rocker is now gone. I had to replace 2 pushrods that had gotten a little roughed up and scratched on the end that the rocker sits on. After I put everything back together I discovered that the pushrod that was damaged the most was clogged! The hollow center where the oil comes up through had actually somehow gotten clogged from some gasket material or something else. Weird, huh? Have you ever ran across a clogged pushrod? Is this a common thing that could occur again? Now I wish I would have pulled out all 16 pushrods and check them. But it's all back together now and sounds fine, so hopefully it will be ok. I change my oil religiously every 3,000 miles if not sooner. My oil is always clean. It must have been a piece of stray gasket or gasket sealer (RTV). I didn't have a chance to see the chunk that had clogged it because I blew on the pushrod and it shot out across the garage like a frickin blow gun...& couldn't find the projectile.