Quote Originally Posted by lcorney View Post
Hey guys, recently td42 swapped my tb42 efi gq. Engine is freshly rebuilt with a new head, 10mm pump is only 20,000km old, new injectors, brand new GTurbo green wheel with new manifold and gaskets and front mount intercooler. Only thing that's not new are the glow plugs so it struggles a bit to start when cold, when warm it runs rather good but there is a constant diesel knock/ticking noise that is quite loud hot or cold and increases with revs. I started to think the ticking was normal but I recently drove my mates td42 gq with 410,000km and the engine sounded like a petrol compared to mine. I used a stethoscope to try pin point where the noise is coming from and the majority is coming from the manifolds, especially the intake manifold. Driving me insane trying to work it out
https://www.youtube.com/shorts/LKrLJv73VzM (Video of the sound)
my initial thought when i started your video. (I did not read your full description above) was that you have an exhaust Leak. I still tend to think you do. That video posted by Brazilian is interesting though for sure. Load them both up and grab 3 sound bites. Still think you ahve an exhasut leak though. How muchg boost are you running? and under power are you getting the tuned boost at teh intake?

A faulty or blown off PVC could make that noise for sure though as Stropp suggested.