hi i recently snapped the timin chain on my astra,, but a week or so after i changed tha valves its started smokin,, blue smoke high in tha revs,, wen i done tha head tha pistons seemed ok jus a small nick out ov tha centre hardly nothin and guides were ok.. its burnt oil since i had it but never smoked and thres always bin a smell wen i ge tha revs up which i assume wos tha oil... could it jus need a service cos oil and plugs are black... another thing i noticed after i had head done wos tha wen im changin gear revs seem 2 go up a bit after realeasin tha accelarator and and stick for like half a second,, and a bit rattly,, sure it didn do this before.. its been like this for 3 weeks now.. EML CAME ON YESTERDAY ... notsure.gif