today I changed the spark plugs
good job really they were horrible. the drivers bank (your passenger if you are American) the I think gasket has gone as they was a little oil in the plug recesses and on the same bank 2 of the coil packs were loose, missing nuts and one with the earth straps didn't even have a nut on
all fixted now tho, blowing a little crud out of the back end but its all nice
plus I removed the washer bottle as it stunk of rotten eggs, . cleaned removed the pong and re fitted