Preventative, it has 60,000 miles now (about 97,000 km) I have a bad lifter so I am servicing the cam chest while I am on, replacing inner cam bearings, tensioners and checking everything over.
Only impotent men hunt for sport, the unnecessary destruction of nature serves no purpose other than to make weak individuals feel powerful for a moment before returning to real life where they are back to being the limp wristed scared little punks that they really are.
Probably a bit soft for you then, causing too much dive putting too much pressure on the seals. That's usually why seals fail frequently assuming the tubes aren't more pock marked than a teenager going through puberty.