Hi, I bought my 2002 VW jetta turbo tdi about 6 months ago from my uncle (a diesel mechanic). It just hit the 245,000 mile mark and it runs great, except for one problem: there's a prominent grinding when I'm at around 1800 rpm. I can feel it through the gas pedal and it will vibrate the dashboard. It seems to only occur when the engine is warm and I've been driving for a while. I have searched all over this website and others for a similar problem but I haven't really found any answers. I think it might be the EGR valve but my uncle cleaned it right before I bought it off him and it was still acting up. He may not have cleaned it out properly (check engine light still gives EGR code) and I am going to take it off and clean everything myself, but I just wanted to know if anyone could pinpoint what this could possibly be. My first guess was the transmission, but it shifts like a dream; it's keeping the rpm at that 1800 mark that it grinds. I have been reading that carbon buildup inside the EGR can cause serious damage, could it also cause this grinding? Any help/advice is appreciated. Thanks!