Crankshaft rear flange&bushing

Hi all,

Can someone tell me how may miles the rear cranshaft bushing/bearing will usually last before having excessive wear/play?
Also, is this bushing replaceable or do you have to buy the flange with bushing assembled?

Many thanks.

Providing you keep clean oil up to it it'll last pretty much forever. The bearing itself is a press fit in the flange and is pinned with an oil delivery dowel to prevent it spinning.

The 8V system is essentially the same but the bearing is shrunk tightly into the flange and not pinned.

Thanks Peter