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Right I think ive got it now....the harmonic balencer thats part of the crankshaft pulley has gone bad hence causing all the vibrations through the car. Some good info in this link explains all my issues. https://www.autoblog.com/2016/01/08/symptoms-of-a-bad-or-failing-crankshaft-harmonic-balancer/ Hope this might help some people, i have a new crank pulley on order!

Hi Ryan, good pictures although they look pretty horrific they will definitely give anyone viewing them a real good idea of how the exhaust gas treatment system works and what can stop it doing its job, I might assume your car does not run on adblue as there seems to be a distinct absence of crystallisation on the EGR cooler which I am reliably informed normally causes the blockages in the cooler. The blockages shown are pretty standard for a high milage Diesel engine the oily crud is caused by the the crankcase gas being sucked into the intake system via the PCV unit this is basically engine oil vapour and moisture based contaminants from the combustion process, this is not easily burnt and forms the oily tar in the bottom vents of the cooler especially with the latest fad for cooler running engines to combat the Nox situation, not ideal really, which is why I am researching the possibilities of a catch tank system, ok it will be a pain emptying the tank every week but at least it stops 80% of the solid and water getting into the induction system and causing the the problems you have now. Unfortunately from what I can remember the increased back pressure caused by the DPF blockage will actually kill the turbo due to the decreased flow in the exhaust, the only saving grace with the rocker situation is that the rockers are designed to break rather than hold the valve down until it gets close and personal with the top of the piston and mullers the piston crown whilst turning the valve into a piece of modern art, I always thought that was a bright idea of PSA to make the rockers so they deform a bit and then pop off of the mounting and fall into the deep oil channel under the camshaft I have even seen realtime where the rocker has failed on one of the exhaust valves but the engine still runs even though not very well because it still has one of the two valves working, in the final analysis its a lot cheaper than new valves and pistons. I really admire your resolution in pursuing this as I know from experience its not a nice place to be, so far into this now that giving up would be a costly experience and will rob you of what will be a usable vehicle in the end, the only other thing that I might suggest is ask them as nicely as possible to put some clingfilm or plastic caps over the fuel rail outlets as any debris that get in there will definitely cause injector problems in the future. Regards Steve.

My sons golf was hit in the rear offside quarter some few years ago. Repaired, but was never the same again. Mainly through seals leaking and windows misting up.