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BMW E90 320d N47 Turbo question
13-11-2017, 18:38 PM (This post was last modified: 13-11-2017 21:09 PM by Alexandru.k_24.)
Post: #1
XZBMW BMW E90 320d N47 Turbo question
Hello friends,
First of all, sorry for my long post. I need a little help. A few moths ago I have remanufactured my turbocharger at a local specilazied service. Since then my car has some vibrations at low RPM, under light load. I have monitorized my turbocharger pressure and all seems fine except one thing. The variable geometry, the electronic actuator, to be more specific, has a strange behaviour. ISTA/D indicates that the range of the electronic actuator must be from 5% to 95%. My electronic actuator is at 0% most of the time, with small variations up to 25-30% activation. But the activation of the actuator is not corelated with the engine`s rev or the accelerator pedal position. I have uploaded >>HERE<< a little video to be more precise about the problem that I have described. So, can someone with the same car/engine (BMW 320D, N47, 184HP) can post a video of his turbo values to compare them with my values?
Thank`s in advance.
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14-11-2017, 02:14 AM
Post: #2
RE: BMW E90 320d N47 Turbo question
Hi ..
I don't know how you looking turbo charg .
You need to look turbo charge ONLY on lode.... DON'T look live data on low RPM or rev engine on standstill with no lode...Drive car on some hill with 2500 RPM high gear full throttle and look at turbo boost and actuator
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14-11-2017, 02:39 AM
Post: #3
RE: BMW E90 320d N47 Turbo question
Turbo work's fine. I think the problem is bad connection between Turbo-catalyst converter-exaust pipe (DPF). They are too much tension? You must check this first. Sorry for my english. smile1
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14-11-2017, 07:02 AM (This post was last modified: 14-11-2017 07:04 AM by Alexandru.k_24.)
Post: #4
RE: BMW E90 320d N47 Turbo question
(14-11-2017 02:14 AM)peca034 Wrote:  Hi ..
I don't know how you looking turbo charg .
You need to look turbo charge ONLY on lode.... DON'T look live data on low RPM or rev engine on standstill with no lode...Drive car on some hill with 2500 RPM high gear full throttle and look at turbo boost and actuator

The video is not made with the car standing and idling. I was driving the car at that moment. I have revved the engine from idle up to 4500rpm.

(14-11-2017 02:39 AM)Kojak_Ct Wrote:  Turbo work's fine. I think the problem is bad connection between Turbo-catalyst converter-exaust pipe (DPF). They are too much tension? You must check this first. Sorry for my english. smile1

I don't understand what are you trying to say. If you ask me about the DPF condition, I did the DPF counterpressure test and it was fine. 12mbar at idle and 75 mbar at full load. The values are perfect dor the DPF.
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14-11-2017, 09:24 AM
Post: #5
RE: BMW E90 320d N47 Turbo question
I'm not talking about DPF's condition because you would lose power if you were too pressurized. I'm talking about connections (physicly) from turbo to DPF. Exhaust system high pipe tension.
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14-11-2017, 14:38 PM
Post: #6
RE: BMW E90 320d N47 Turbo question
(14-11-2017 09:24 AM)Kojak_Ct Wrote:  I'm not talking about DPF's condition because you would lose power if you were too pressurized. I'm talking about connections (physicly) from turbo to DPF. Exhaust system high pipe tension.

All the connections are OK. I have checked them. No air/smoke leak. The connecting element between DPF and Turbo is brand new.
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15-11-2017, 07:41 AM
Post: #7
RE: BMW E90 320d N47 Turbo question
To me this sounds like "remanufacturing" has failed in some way. Connection and adjusting actuator to turbo is very precise what I have heard. Local turbo specialist have said that it is very hard to adjust (if impossible) new actuator to used turbo if You do't have some special tools. Even then it is a hard job. Cannot confirm, I have never tried (and will) that.
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15-11-2017, 08:18 AM
Post: #8
RE: BMW E90 320d N47 Turbo question
(15-11-2017 07:41 AM)jaki Wrote:  To me this sounds like "remanufacturing" has failed in some way. Connection and adjusting actuator to turbo is very precise what I have heard. Local turbo specialist have said that it is very hard to adjust (if impossible) new actuator to used turbo if You do't have some special tools. Even then it is a hard job. Cannot confirm, I have never tried (and will) that.

That's what I wanted to check. I want to compare my values with the values of a original/non rmfd turbocharger, just to be shure that i'm right. If the values are different, then I will ask my money back and buy a new turbo from BMW.
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15-11-2017, 12:49 PM (This post was last modified: 15-11-2017 12:55 PM by bmwcare.)
Post: #9
RE: BMW E90 320d N47 Turbo question
(15-11-2017 08:18 AM)Alexandru.k_24 Wrote:  
(15-11-2017 07:41 AM)jaki Wrote:  To me this sounds like "remanufacturing" has failed in some way. Connection and adjusting actuator to turbo is very precise what I have heard. Local turbo specialist have said that it is very hard to adjust (if impossible) new actuator to used turbo if You do't have some special tools. Even then it is a hard job. Cannot confirm, I have never tried (and will) that.

That's what I wanted to check. I want to compare my values with the values of a original/non rmfd turbocharger, just to be shure that i'm right. If the values are different, then I will ask my money back and buy a new turbo from BMW.
Reman hardly ever work successfully.
Get new Garrett or Mitsubishi (depending on your model)

Checked your chassis, you've Mitsubishi
BMW 11 65 8 519 476
OE Mitsubishi: 49335-00642
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