Hope you guys can help, my 850 t5 has developed an annoying drip of oil and is going through a noticeable amount. No drop in performance. Bit of investigation pointed to upper engine so I purchased new rear camshaft seals as they are a known spot. Gone to change these this morning and it's coming from above there, from the rocker cover area. Took the plug cover off and found it with a fair amount of oil in there. My only thought would be the oil filler cap. Clean it up, cleaned the filler cap seal etc then thought about what could cause that and I'm stuck at either dodgy filler cap seal or excessive pressure in engine, ie, a blocked pcv system. The guy I bought the car off said it had had the pcv done but there's no documentation. I've heard one way of checking I'd to pull the dipstick and look for vapour.
This is the result of that
https://youtu.be/As06v2lQBYw
Are the filler cap seals known to leak?
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