Pulled the valve cover and found the roller lifter that was the culprit. Replaced it. Now no more tick. All the others looked good. However the far left cam lobe was noticeably scratched (pic attached).
Is this scratched cam lobe enough to warrant new cams? Or does it not matter since this engine uses roller lifters which would just roll right over the scratches anyway?
The cam should be replaced.
Tester
Rip engine 
lol. Probably just gonna drive it into the ground
That’s awesome! I wouldn’t worry in the least about the scoring on the cam lobe, myself. Like you said, roller lifters. Will that cam lobe be more susceptible to increased wear? Yeah, maybe. But the engine already has 170k on it. Another 80k is all I would want to reasonably expect out of the engine anyway.
