'02 Impala 3.4l 103K: Loud(er) Upper Engine Clicking

[Colt Hero]

Bought that pushrod tool from Lisle this week. Paid $19 locally - which is as good as I would've done buying it on the Web. AutoZone and Advance didn't carry it and wouldn't order it, however, so an independent ordered it for me and had it (unbelievably) the next morning!

Also picked up some #220 grit emory cloth. That was the highest number sold, but yesterday while I was looking at caulking guns, I noticed sandpaper with a grit number over 400! It didn't say "emory" on it, but should I use this instead, or is the #220 OK. #220 seems to have some teeth to it when I run my fingers across it.

Still no engine clicking since running the Seafoam through the oil and changing the oil. Sounds very quiet.

Planning on starting this Thursday if weather permits.