i had a new gasket fitted about 4 month ago and it is leaking again... is there an oil breather filter located on the top of the rocker cover the little black bit with the pipe going into it because if so that was causing the gasket to blow on a calibra i had years ago...just got to find the problem cause it looks f**king shocking parked at traffic lights with smoke belowing out

 

Who did it for you, surely you could take it back and get them to look at it for you?

There is an oil separator on top of the cover that has quite a thick gasket it in.

I recently did mine so hope it lasts a while.