...and there were no knocking sounds earlier? Two years Iīve got same situation, there were no gap between cam and follower, and two followers had a deep dent. This was before a made total rebuilt. There were plenty of other problems with that engine too...
You mentioned earlier posts that you installed 134 cam and hard pad followers, but how was geometry? In my case lash caps were installed and exhaust valves were shortened to get a right angle against cam shaft. The machinery shop told me, that without those modifications the cam would worn out in 5 minutes. All though my head was from 1.6 litre model.
Anyway, hopefully it isnīt nothing serious.