Yes I looked at your post and that's what I tought that we had the same problem but I did'nt want to hijack your thread.
I never used a stethoscope I usually use a screw driver and it works fine. Though I could borrow one.
Today I've put the smoke machine on the intake and I had a leak on the right part of the w pipe even if I had new gaskets. I've put silicone and I'll see if that was the problem.
With the smoke machine I unfortunately found that I still have to leaking injectors the same ones that were leaking before I changed the injector seals ??? I'll have to double check that.
Thank's for your help. I'm going for 4 days and sunday I'll check If the noise was coming from the leak I fixed. I have a doubt but I'll see. The noise is so loud I'm shy to drive it
Thank's again