My engine is leaking oil, I have removed the cover and found that the oil appears to be leaking from the part of the engine pointed to by the arrow in picture below. This only started recently after a (home) service so I think its a missing part. Can anyone tell me if I am correct and if yes what is the name of the part that I am missing (I have looked in my Haynes manual but can not find any reference to the section of the engine).
https://goo.gl/photos/jA2BXUBcGiXxXdSX8
Thanks for any help in advance
