I've been having clutch drag issues and have been chasing and fixing different things but the drag came back worse than ever even with the external mechanism appearing to be working normally now.
Took the engine out to investigate and found I could hardly turn the primary gear and oil seal was leaking despite both parts being almost new. Primary gear was quite hard to remove and had what looks like conjealed oil inside. Crankshaft thankfully looks fine. Cleaned the oil out and it slides back on no problem and turns properly however the bush closest to the block has had it.
What has caused this and how do I make sure it never happens again?