I blanked off my egr pipe at the exaust manifold today. that was easy so I checked the egr and manifold for sludge. my 99 model had about 10mm of black tar right through so I removed the inlet manifold...pressure cleaner and whatever solvent available is getting it clean...hard to imagine how this td5 still went so well with that serious neglect..still plenty to do as i may even get ripped off and buy a new gasket, a good oportunity to tidy hoses and wiring etc.