Hi guys i know its not an omega but knowing what a helpful bunch you lot are  just thought i would ask.

A mate of mine has a w reg 2.0ltr vectra sri (poor lad) he has a crankshaft sensor to fit ,is it a difficult job, anyone got ant tips or advice,is it the same engine as the 2ltr omega? is there a maintanance guide for it ?

Any help much apprechiated