2.0 tdi BKD 140, weird noise after 2000krpm

[anand93]

Hi all first time posting, not sure if it's been covered.

But basically I have a 5 door 2.0 tdi BKD 140 and when I put my foot down, as soon as it gets too 2000rpm it makes this weird vibrating/ suction noise, not exactly sure how to describe it but, it sounds like it's sucking something and virbrating at the same time, but as soon as it goes over 2000rpm it stops and goes like normal.
All the boost pipes and turbo have been checked out and there's nothing wrong with them.
Thanks

 

[Geraldy212]

Sounds like what you have there is a resonance. In other words, something is vibrating exactly and only when the engine hits 2000 rpm. You might try having it on a hydraulic ramp, running the engine at exactly 2000 rpm, and have someone underneath looking to see where the noise is coming from. Most likely something is loose, and needs securing properly. Could be the exhaust system, plastic covers, fuel cooler, etc. The person underneath needs to have a wooden stick to touch several components. The wooden stick will dampen the vibrations and the noise will stop. Good luck.