question for the brains of the forum!

[The Fatty]

iv just washed my rocker cover in thinners to get all the oil off. i was just wondering what the bit at the top of the cover is for? the bit with the 2 pipes out the side and one out the bottom. is there any plastic bits in there?

 

[The Fatty]

its te rocker cover on the diet engine btw!

 

[The Fatty]

nobody knows then?