150 tdi flat spot when cold

[towcester vag]

well the other halves car has had a slight flat spot when cold
no faults and everything within specs on measuring blocks (vcds)
the only noticable difference was it started to black smoke a little
anyway was on way home the other afternoon and at 2000rpm i got a knocking/rattling
no oil light or anything so stopped and checked the usual all ok
car quiet at idle and the noise came in at 2000rpm
drove the 3miles home slowly and then stripped the top of the engine down
found the camshaft worn
rebuilding at the moment
had turbo off to check wear etc and clean veins/intake manifold etc

 

[Tessitura]

my pd150 drives like **** till its warmed. itll boost from cold but it doesnt like it.

 

[towcester vag]

just a update
new cam/buckets/bearings/oil and filter change
its like a new car
now done 300miles since rebuild and i think its better than its been for a long time