Oil fumes in cabin

[Cymru1]

Right guys, need some ideas on this. Started her up from cold and let her idle for 30min. I checked every pipe under the bonnet and All were fine! No smoke or oil fumes. However, i cant check them under "driving/boost" conditions! Any suggertions?

[JP]

rolling road with the bonnet open

[Greg_S]

Check the PCV valve that goes into the sump. May be blocked up and not closing off on boost and pressurising the breather system up

[Cymru1]

Could it be the bulk head seal under the bonnet. The one which separates the vent in/fuse board, wiper motor from the engine bay. i never fastened mine correctly once and i had the same symptoms

Never noticed until today, mine is missing! No seal at all, could explain my particular "fumes" issue. These im guessing are N.L.A, (anyone know?). May visit the scrappy for a donor.
Looking at some engine bay pics on the forum, some of you have seals both for the bulkhead and up both wings. I have none!