Thread: Disco 4 TDV6 3.0L Boost or Exhaust Leak

I've developed what I'd describe somewhere between a whistle and woosh left hand side of vehicle when driving, only when under load, nothing when rev at stand still.


I thought it might be leak in the boost so took off the Turbo hoses / pipes. The lower and the middle are fine. As per the first 4 photos the upper is delaminating with some of the inner stuck on metal pipe, but no clear crack / leak to surface. There is a small spot in middle not clear in photos where I can see the orange hose through the inner section.
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While I've this and a couple of heat shields off I can see oil / soot under what I think is coming out and down the heat shield / front of exhaust manifold area in photo 5
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and there is also some soot around where the cross over is bolted to the turbo (and possibly further in and back) photos 6 to 8
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I've read that manifold is a sharper a ticking sound and cross over is more chuffing / flutter and boost is a whoosh sound
My sound is some where between a chuff / flutter and whoosh and varies a little depending on load and temp
It generally takes a few minutes of driving or a steep hill to get it, that's why I thought boost leak.
It will come at mid revs and drop off again with revs or when revers goes over a certain amount, but also depending on how steep hill is, etc
No codes and while typical lag on accelerator I don't think I've any meaningful loss of power.
No smoking, might get a short puff of black smoke if I sink the boot and hasn't been done for a while, but no ongoing smoking and I have no noticeable Oil loss and ground under the engine is dry
I did have right side manifold fixed nearly 2 years ago, there was a couple of broken bolts, it was sharper sound and intermittent and I could get it at cold / standstill dabbing the accelerator, this does seem different.

I'll replace the upper Turbo hose anyway.

Just looking for some general pointers but obvious questions I have are
1. Does this sound more like a boost leak or with the oil / soot is it likely to be one of the manifold or cross over
2. Could the Soot / Oil at front of manifold area be an oil seep from further up, e.g. EGR ?
3. Would there end to be a light dusting of soot around flanges, manifold joints anyway at 230K and 15 years
4. Any views based on description whether it is a boost leak, or manifold or cross over or where I should be trying to get my borescope into i.e. with points 2 and 3 could I be chasing red hearings
5. What's the risk of continuing to drive if no codes and appears to drive normally other than this

If its manifold or cross over while I hear they can be done with Body on I am a but time poor so will likely be into Indy, but I'll like to be armed with as much info as possible when I call them this week.

Ok, a cup of tea and bit more poking around its clear the Turbo to Manifold Gasket is blown, there is a some soot on the heat shield in front of it and the gasket is displaced and clearly blown
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So my questions changes

Will still need to work out what the soot / oil at front of manifold above where the water hose sets into engine block is and may well still be broken stud / warp here with leak, but this patch is a little oily.

Primary question now is how hard to replace turbo gasket, I've taken hoses off before to replace AC compressor so that side is good, but I see the 2 nuts on the side where I can see the Gasket issue but there is another bolt / nut on engine side, does it require body off to do this ? can I access from above ? its only 5 years old and if I use plenty of penetrant in advance and some heat is it likely to break ? any advice / tips appreciated

Note the Turbo was changed ~5/6 years ago nuts and bolts look healthy.