Hi guys,

A friend was replacing the intake valve retainers in my F20 and saw some pretty weird pitting on the tip of the valve stem.

I'm wondering if anyone has seen this before and what it means? Is it just a matter of time before the engine grenades itself if I dont get the valves replaced?

Here are some pics. Pitted stem tip on Cyl2:


Non pitted stem tip on same cylinder:


Roller doesnt seem in terrible shape, though not great. A bit scratched up.


What do you guys think could have caused this? Couldn't find much on the forum about it. And what do yall suggest I do?

Thanks!

 

These are OEM valves? Maybe the adjustment was too loose?

Thanks!

 

From what I know they are OEM. ^ is what the guy helping me out mentioned could be the culprit but I wasn't sure.

 

What was the valve lash set to? Could be aftermarket piece?

 

I have seen this on aftermarket valves, never on oem.

 

OEM are the Some of the best valves out there