Over the Christmas holidays, I'm going to get stuck in and replace the valve stem seals. And along with that, timing chain, oil/water pumps, o-rings, seals, cams/springs/shims.   My car has been burning oil for some time, and at nearly 129k it's not really a surprise. I do look after it, especially as it gets a bit of abuse on track, so it does get regular oil changes and plenty of fannying about.   I decided to do some investigating on Saturday night to do a dry comp