I must admit it looks a right chew on to do. I had my car on the ramp the other week fitting tyres and a general check over. I used a bit of brake cleaner to clean a bit of oil off the sides of the engine and since then its started to leak out of the side of the sump gasket.I think the brake cleaner must of done something to the silicone sealer. Is there any cossies out there that dont leak oil?I wish mine didnt lol.