The front crank oil seal seems to weep some oil, not pouring out but still quite bad. What is involved to chage this? Any other harm of the leaking oil than just the mess? I assume I need the cam tools to do this?

Quote from a post by "Matchless"
"The cambelt sprocket has to be removed to change the seal and because it is made from a sintered material (metal powder pressed into a mould at high temp) it need special care.

You have to bolt a long bar or piece of angle to the sprocket using the aux belt pulley bolt holes. Use this bar whilst removing the centre sprocket bolt (v.v.v.tight). Do not use an air hammer, do not lock it in gear and wallop it etc, you will shear the keyway off the sprocket.
Once the sprocket is off you can lever out the old seal. Now pull out the spacer / sleeve that the seal runs on, turn it back to front and refit it. This gives the new seal an un-worn surface to work on.
Replace the sprocket and fit a new sprocket bolt (it is a stretch bolt). Restrain the sprocket with the angle iron as before and tighten the bolt to 250Nm then a further 60 degrees. (check this...its a while since I did one)
Ideally its a job for two people. "

http://www.omegaowners.com/forum/YaBB.pl?num=1290628831

Thanks  :y one question for you experts: would it be possible to replace the seal without locking kit? Plan to use the same belt, only 20000km old. If I just mark the belt and the sprockets and put the same belt to the exactly same position?

kcl wrote on 11. Feb 2011 at 10:28:

Thanks  :y one question for you experts: would it be possible to replace the seal without locking kit? Plan to use the same belt, only 20000km old. If I just mark the belt and the sprockets and put the same belt to the exactly same position?

Anyone?  :-[

Locking kit needed