Asked here awhile ago about some severe valve ticking after a valve adjustment showed one valve outside spec. I didn't get a fix to the problem from the board, but since I found the fix, I thought it would be good to share it: Turned out to be the lifter bucket.
The old one had a deep indentation on the bottom where the valve contacts the bucket, the noise went away completely after putting a new one in.
Has anyone else seen this? Seems like an odd failure to me, especially since it was just the one.

However, I now have a fairly major oil leak at the front of the engine that I can't figure out the source of.
Since I had to remove the camshaft to change the bucket, I changed the timing belt, crank seal and cam seal at the front of the engine as well as the valve cover gasket, including a little sealant on the sharp corners.

Afterward, the car lost about a litre of oil in 600km, soaking everything in the engine compartment including the water pump, alternator, fan, etc.

Any ideas on what I might have done wrong? The cam seal didn't appear very tight on the shaft although it appears to be seated properly.

Thanks for your help!

It's a 91 240 wagon with about 230,000 kms.