JeffT wrote on 12. Jan 2007 at 13:46:
Following earlier posts, have decided to take off coil pack / HT leads this weekend and check plugs. If there is oil down the plug wells, what exactly does this indicate? Have done a search but can't seem to find the definitive answer. My earlier post was ref. CEL staying on and engine hesitating/under-powered
This usually indicates the rocker cover gasket has failed and needs replacing. Usually you replace the O'rings aswell that are for the bolt holes.
Hope this helps