the first picture shows the parts you need to get at, the vnc system
the second picture is from the turbine side showing the ring that looks like a castle top (?) that connects onto all the fingers (?) to operate all the vanes
third a silmilar pic
fourth shows it all cleaned up, although not the best pic.
you will need to remove the manifold with the turbo still attached. from what i can remember it goes something like this.
remove the turbo pipes, oil feed line, oil return line, a bracket behind the banifold to the block, front pipe fixings, then undo the 10 bolts holding the manifold to the head. if i haven't forgotten anything it should all come off
you can check now to see if you are in the right area by diconnecting the actuator and seeing if the control finger moves freely for about 30degrees or so (
), it won't!
the actuator needs to be taken off, then undo the 6 (?) bolts holding the housing together. mine was rusted tight so needed a little heat and a tap but be careful as there are alot of small moving parts inside. the pics should help you to see where everything goes
the second picture shows the 6 wheels (?) that hold the castle ring in place. note that the pins holding the wheels in also come out of the housing.
the main part of the vnt system that you need to get at is in picture one. take out the 3 allen bolts being very careful as they are quite a small thread into a cast housing (easy to break!) so use plenty of freeing oil such as WD40. once you get that off you will see where the problem lies, the surface where the vanes move will have marks on them where it has been catching. sand down the surface in the housing to make it smooth again and get rid of the rust layer, it might look like there isn't much of a layer there but it needs very little to jam the blades.
just make sure everything goes back together spotless and in order and making sure evrything moves freely.
i will re-read this reply again, it probably won't make sense
but it isn't half as complicated as it sounds
about the only thing you need to get before hand is a new manifold gasket, only a few quid from any decent motor factors, no need to go to the main agents if you don't have one nearby
let us all know how you get on
i do have a short video sequence of the movement after its all cleaned and rassembled that i will try and get loaded onto youtube and post tomorrow night, i don't get much succes any other way posting vids