Originally Posted by
R4N S S
cam trigger sensor?
its been modified as they are not normally there
Wrong, totally standard and it's merely a breather, there is also one in the back of the cam cover!
I had some idiot from the FSOC trying to tell me that someone had drilled it, needless to say I never re joined the club!
To the OP, most likely culprit is your cam cover seals, they leak by the pulleys and probably makes it look like it's coming from the hole.
Martin