Hi everyone as you might know my 55reg cdti 150 is going in to get the manifold and cambelt replaced on Tuesday, so I thought I would remove the egr valve beforehand to give it a clean, it didn't seem too bad, I removed the 4 flex bolts and the plunger would not move at all, after a good clean it's now moving freely, does anyone know what symtoms this would have caused and is this the main reason for my broken manifold, cheers James