Been having a vibration a low RPM for ages now. I've replaced the clutch, flywheel, CSC, uprated gearbox, exhaust, fuel pump and taken out all intake mods which may cause vibrations but it's still doing it. Literally at my last nerve with the thing now. It only does it when the engine is at operating temp and when at low revs applying load to the engine. It's just a vibration coming from the engine bay. Car drives and runs perfectly. Car is a 1.7 CDTi (2011).