I changed the crank front (timing case) oil seal at the weekend. It's not a difficult job but a couple of observations:

1) That is the strangest seal I've ever seen. The inner lip is like thin card and folds rather than bending like rubber. Be careful fitting this. Anyone know what it's made of and why it's like that?
2) The centre bolt torque was 150nm + 180degrees. I replaced the bolt and couldn't get much past 90 on a long breaker bar. The bolt that came off was not done up to anywhere near this torque so I'm not that worried but wondering what other folks experience is?
3) The manual says there should be a diamond washer behind the crank nose bush and an O ring. None were present on mine and I fail to see what the purpose is so it went back the way it came out but should these bits be there or deleted in later years?

Ta,