I have a oil leaking frop the black cap on the left side of my engine on my 94 Integra LS. It is very minor, however i took it to the shop to find out whats wrong with it. They said i need to change my oil ring and that Black cap. Does anyone know what the black cap is called? It is not the cap where you put the oil in... it is more to the left side of the engine... If anyone knows can you please let me know what it is