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18lstroup 18lstroup is offline
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Default N54 wastegate washer fix - 04-19-2019, 04:02 PM

So i am going to do the washer wastegate fix on my car. After countless searches I cant seem to find a post that has any kind of picture that shows where exactly the washers are going. Can somebody clarify or send me to the right post? Also should I only do the washer fix on the front turbo and just adjust the rod on the rear? Or should I do the washer fix on both? Does either of these cause boost lag?
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studio54 studio54 is offline
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Default 04-20-2019, 10:21 AM

Hello,

I believe the easiest way to do the washer fix is to loosen the bolts (red circle),

then insert modified washers as U instead of O behind the support (green). So you can just insert them without having to pull out bolts.

Basicly it will extend the wastegate arm length, and acts just like an adjustement.

Maybe you should start with 1 washer (8mm), and then add one if it's not enough.

Concerning lag i am pretty sure that rattles can induce some lag, it depends of what kind of rattle probably.

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mrmax1984 mrmax1984 is offline
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Default 05-24-2019, 06:32 PM

Yup, that's where the washers go. Did it a few years ago, still going strong without rattle.

The washer fix is only for the front turbo. The rear turbo you can adjust the actuator arm with a very small (3.5mm or 4mm?) wrench, very carefully.
Use a vacuum pump with a gauge to check for proper closing.

Here's one thread on the matter: front turbo actuator rod adjustment

Here's another: Wastegate rattle

Last edited by mrmax1984; 05-24-2019 at 06:41 PM..
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wolfusor wolfusor is offline
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Default 05-28-2019, 12:03 PM

I did it today. Adjusted both rods for front and rear turbos. Will install ********* these days and see how it feels, pretty sure should be good. Two washers for front turbo and the wastegate is fully closed around 5.9hg of vacuum (it wouldn't even close fully before the adjustment). Fingers crossed


2007 N54
E92 MT
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Vorsprung_CJB Vorsprung_CJB is offline
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Default 05-28-2019, 12:15 PM

How the hell did you reach any of this? Is there that much more room in the 335 engine bay?
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NW_E61 NW_E61 is offline
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Default 05-28-2019, 12:29 PM

I have been working on this on my E61 the past few days. Can safely say that there is no space either. I was able to adjust the rear rod by going from the bottom and working between the gap of the pipedowns (kitten-less AR's.) Having stock pipedowns might make that difficult.
Front I was able to access by 100% feel once radiator fan was removed. I am doing the washer fix for the front.
Really not a terrible job but wish I had smaller hands.

Last edited by NW_E61; 05-28-2019 at 12:31 PM.. Reason: apparently catt less is explicit
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wolfusor wolfusor is offline
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Default 05-28-2019, 12:43 PM

For the rear turbo it's not hard with small tools, 10mm wrench cut in half and small 4.5mm wrench. Front turbo is trickier, especially putting the washers with the magnetic tool between the housing and bolts while tightening them. Take your time, keep trying and you will find a good position to finish the job.


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E92 MT
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Vorsprung_CJB Vorsprung_CJB is offline
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Default 06-10-2019, 09:24 AM

Did one of you upload a video to YouTube of this? I swear I just watched one doing exactly what you describe, and it was recent.
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wolfusor wolfusor is offline
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Default 06-10-2019, 01:26 PM

Try this
BMW 335i N54 Wastegate Rattle Fix (Front + Rear Turbo) - YouTube


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