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  #41  
Old 05-09-2022, 03:30 PM
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Quote:
Originally Posted by SirHiss View Post
Wayne you need to start charging this guy lol
Indeed owe him a keg or two of finest beer if he ever comes over my neck of the woods....anyhow still gonna hijack any x5 3.0d owner i find and ask em to drive mine and me theirs...already did it once to diagnose my slow start issue...damn magnetti marelli stock starter 'known' issue massive amp draw killing my batteries was conclusion there
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  #42  
Old 05-09-2022, 04:27 PM
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Quote:
Originally Posted by SirHiss View Post
Wayne you need to start charging this guy lol
Just paying it forward..
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  #43  
Old 05-09-2022, 04:40 PM
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Originally Posted by omodos View Post
Wayne hi, the black hose 5odd cm diameter connected to egr valve has what looks like wire clamp and also a worm hose clip on it attaching it to the egr valve..
how tight does that need be? No play at all? Plus looking at a photo i took that i just looked at i can see like an indentation from someones nail, not sure its a tear but how significant is this part of the system re turbo spool?
Here's (close to) what my EGR connection looks like (not my car - image from internet): -



The red shaded section is a worm-clamp connection for the exhaust gas connection on the EGR. This needs to be a good fit - no play, or exhaust gases and soot!) will escape here and make a mess (or worse). If this joint has play, it may be that the connection is no aligned correctly. There is also a stainless mesh "gasket" in this joint.

The blue shaded section is the boost inlet connection (from the inter-cooler output). There is a wire clip holding this in place and I often see this installed incorrectly (even do this myself once!). There is a gasket in this joint too - a very soft rubber (silicon) double-lipped seal that need to be in good condition or you will get a boost leak here. This joint may have a small amount of play in it but normally very little. If it's loose, the clip may not be installed correctly (and you could have a boost leak - often indicated by an oil-film on EGR valve).

Older (pre-LCI) cars have a large worm-clamp at the blue location (not the newer wire clip) but LCI cars should NOT have a large worm-clamp here.

Damage to the large black boost hose (i.e. a hole) will also be bad (a boost leak!).
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  #44  
Old 05-09-2022, 04:46 PM
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Having a similar issue, almost no boost under 2000rpm and a growing whisle sound. Then it kicks at 2 / 2.5k and pulls fine with no smoke (egr vacuum hose blocked, otherwise little smoke with egr working). Doing a supercharger sound at high load tho..


Changed most of the vacuum hoses around the turbo and the pressure converter (next to the turbo, not the egr one under the intake manifold).


Next will check the exhaust manifold for cracks with an endoscope, but not sure it's that as i have no smoke under the hood..


With an obd scanner i get around 21psi when the turbo really kicks in, no idea if it's a good value.

Last edited by grounch; 05-09-2022 at 04:52 PM.
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  #45  
Old 05-10-2022, 01:04 PM
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Quote:
Originally Posted by wpoll View Post
Here's (close to) what my EGR connection looks like (not my car - image from internet): -



The red shaded section is a worm-clamp connection for the exhaust gas connection on the EGR. This needs to be a good fit - no play, or exhaust gases and soot!) will escape here and make a mess (or worse). If this joint has play, it may be that the connection is no aligned correctly. There is also a stainless mesh "gasket" in this joint.

The blue shaded section is the boost inlet connection (from the inter-cooler output). There is a wire clip holding this in place and I often see this installed incorrectly (even do this myself once!). There is a gasket in this joint too - a very soft rubber (silicon) double-lipped seal that need to be in good condition or you will get a boost leak here. This joint may have a small amount of play in it but normally very little. If it's loose, the clip may not be installed correctly (and you could have a boost leak - often indicated by an oil-film on EGR valve).

Older (pre-LCI) cars have a large worm-clamp at the blue location (not the newer wire clip) but LCI cars should NOT have a large worm-clamp here.

Damage to the large black boost hose (i.e. a hole) will also be bad (a boost leak!).
cheers buddy here is a pic of mine and the slight mark on it if you zoom in looks like a nail mark, got 2 clips by the way
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Last edited by omodos; 05-10-2022 at 01:10 PM.
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  #46  
Old 05-10-2022, 01:08 PM
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Originally Posted by grounch View Post
Having a similar issue, almost no boost under 2000rpm and a growing whisle sound. Then it kicks at 2 / 2.5k and pulls fine with no smoke (egr vacuum hose blocked, otherwise little smoke with egr working). Doing a supercharger sound at high load tho..


Changed most of the vacuum hoses around the turbo and the pressure converter (next to the turbo, not the egr one under the intake manifold).


Next will check the exhaust manifold for cracks with an endoscope, but not sure it's that as i have no smoke under the hood..


With an obd scanner i get around 21psi when the turbo really kicks in, no idea if it's a good value.
Wish I could help, all i can chime in with is if you had the manifold leak yup black soot in area is clear...other than that same issue as you...probably will take it to guy who did manifold and ask him to do once over on hoses etc and the pressure converters
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  #47  
Old 05-10-2022, 04:29 PM
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Quote:
Originally Posted by omodos View Post
cheers buddy here is a pic of mine and the slight mark on it if you zoom in looks like a nail mark, got 2 clips by the way
Yep, identical to mine. The wire clip looks to be installed correctly.

What I think you are calling the second clip is a factory fitted clamp on the rubber hose connection to the EGR connection flange. This factory fitted clip cannot (or should not) be removed or loosened. A new charge pipe comes with this clamp already fitted (at least three of them in fact...)



Can't zoom in on your images (attachment is too small) - can't see any damage but as long as there's no hole, I'm sure it's fine.
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  #48  
Old 05-11-2022, 12:56 AM
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Originally Posted by wpoll View Post
Yep, identical to mine. The wire clip looks to be installed correctly.

What I think you are calling the second clip is a factory fitted clamp on the rubber hose connection to the EGR connection flange. This factory fitted clip cannot (or should not) be removed or loosened. A new charge pipe comes with this clamp already fitted (at least three of them in fact...)



Can't zoom in on your images (attachment is too small) - can't see any damage but as long as there's no hole, I'm sure it's fine.
Cheers wayne, you can just about see what looks like the indentation from someones nail on the left hand side of the black tube no need to zoom in, but I guess even if that was a tear it wouldn't affect boost...and ta for clarification the only clip in essence that actually does any tightening is the wire one....still to test see if the plunger goes up an down at turbo side to verify we are okay there, will get round to it someday....
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  #49  
Old 05-11-2022, 06:02 AM
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I think I can see what you are referring to - looks like a small cut in the hose from the top cover or something.

If there is a tear, that would affect boost, although not much if it's only that small a tear.

Once again, without actually measuring the boost levels with the appropiate tools (meaning software or auto-scanner), it's all guess-work.
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  #50  
Old 05-11-2022, 06:20 AM
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Had a look through my photos and found a couple of images of my engine that show a normal charge pipe to EGR connection (first image) and a leaking charge pipe to EGR connection (second image): -

(Click on each image for larger version)

Good charge pipe connection...


Poor charge pipe connection...


In the lower image, the charge pipe gasket had been pinched and the charge pipe was not seated correctly. The fault was evident from the oil blow-by on the outside of the EGR body.

The charge pipe seals are pretty thin, soft and easily damaged...



HTH...
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