Quote Originally Posted by mudski View Post
So was it doing this prior to blocking the EGR? Sorry I can't remember if you said or not. If not, try removing the plate and having a go. Also, while its not real common, some CRD's need a small hole drilled in the plate to equalise the pressure in the EGR so it thinks its still working.
If you're question is towards me mate...
Mine's been doing it since day one of bringing it home. It hasn't gotten better or worse. And no my EGR still not blocked. Still gotta apply that and the valves.
I'm thinking of blocking it temporarily just to see if this sound goes away. This way it'll eliminate or confirm if it's the EGR pipe being cracked/warped. But I doubt it's the EGR personally.