Doh
Thought about it, identified radial play, wrote axial play
The play on mine is pretty much as your video, so perhaps not smoke from the turbo. It is chucking quite a bit out and consistently. I was perhaps hoping that the smoke was just the turbo, but perhaps not.
I'm glad I wasn't being a numpty in trying to get that cobra pipe off,and upon reassembly I found out I could get to the lower bolt from the underside with the engine cover off. Am I right in thinking that the difference is that the inlet is 5cm on the earlier cars and 6cm on the DE cars. Is that where the extra 10hp comes from and is this the same turbo that was fitted to the 9000Aero ?
The valve cover is off again, before I removed the exhaust cam I removed one by one the inside camshaft cap bolts around cylinders 2-4, plugs out. In each case it took a couple of seconds and then I could see the oil coming up the gallery. I took that as confirmation that the tappets would also be getting oil.
The exhaust tappets have been removed from3 and 4 again and the micrometer used.
The tappets seem to be in the 32.95 - 32.97mm range,but they seem to be worn at the top and bottom as you can see in the photo,indication of a little rocking? The spec is 32.959 to32.975mm
I would say that the tappets are pumped up hard, so the sump drop and fresh oil seems to have made a difference.
The tappet bores are suppose to be 33.00 -33.016mm. They are quite difficult to measure, with vernier calipers, I think they were OK,but will recheck.
I'm now thinking that the tappets themselves are worn.Would that cause them not to pump up fully giving noise, or cause the tappets to rock in the bores with each reversal causing a knock. From simply removing /inserting them I would say they feel fine