No sooner had I fixed the noise from the belt tensioner than another issue arose. Once the squealing noise from the tensioner assembly was sorted out, a Banshee screeching started to make itself known in the engine bay. Our local Nissan dealer thought that the problem could be a leaking exhaust manifold, so I did more checking and I discovered a leak where the exhaust manifold and EGT pipe connected. I cleaned things up and made sure that things went back together properly, but that still didn’t fix things. I also checked as best that I could around the exhaust manifold and no where could I spot the tell-tale marks of a leak. It also didn’t seem logical that the noise was coming from the exhaust manifold, as it varied so much, coming on and off at different times. However, then I found that the turbo dump pipe had a large crack at the turbo flange. So a new dump pipe was installed (great service from DEA Performance), yet even that didn’t make any difference to the sound, nor was there any noise to give away that the dump pipe had cracked.