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  #1  
Old 03-19-2014, 04:30 PM
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W126 300SD Garrett wastegate diaphragm?

My wastegate is leaking oil all over everything beneath it. It's not a lot of oil of course, but over time... I cannot seem to find a new diaphragm anywhere, even places which have turbo rebuild parts don't have it. Does anyone know where to find these?
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  #2  
Old 03-21-2014, 12:40 PM
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Join Date: Apr 2005
Location: NE Ohio
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Are you talking about the wastegate itself or the wastegate actuator?
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82 300SD 145k
82 300SD 265k
87 420SEL 230k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
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  #3  
Old 03-21-2014, 12:44 PM
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The actuator, I guess. But I'm not aware of any other diaphragm?
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  #4  
Old 03-21-2014, 12:46 PM
JamesDean's Avatar
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Join Date: Apr 2005
Location: NE Ohio
Posts: 5,008
can you post a photo of the area and point out where the leak is coming from?

if its the actuator you can probably just get a replacement actuator. I dont think they're that expensive. Mercedes doesn't list a part number for the actuator so you'll need to talk to a turbo shop.
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

82 300SD 145k
82 300SD 265k
87 420SEL 230k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
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  #5  
Old 03-21-2014, 12:48 PM
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Join Date: Aug 2007
Posts: 14
How is the actuator even removed? I've tried and tried on my old turbo, without success.

I'd love to replace the actuator with one that isn't garbage. For example, that can be adjusted externally, and preferably without this particular method of retaining the cap, which is very difficult to deal with underneath the vehicle.

The leak is coming from behind the cap. The problem is the diaphragm. There's only one rubber diaphragm in there. I have two, one is visibly cracked, and the other one is on my car and leaking.

If I had the KKK turbo, I'd have replaced the actuator already in this situation
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  #6  
Old 03-21-2014, 01:05 PM
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Join Date: Apr 2005
Location: NE Ohio
Posts: 5,008
Here are some pics of my turbo...

Rebuilt OM617 Garrett AiResearch Turbo - Imgur

Hmm I can't say that I've opened it up or figure out how to remove it. The turbo on my 91 300D is much more amenable to actuator changing.

I would suggest contacting Pure Turbos..they're rebuilt my turbo. Maybe they can give you some additional insight?
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

82 300SD 145k
82 300SD 265k
87 420SEL 230k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
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  #7  
Old 03-21-2014, 03:25 PM
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Posts: 14
Quote:
Originally Posted by JamesDean View Post
I would suggest contacting Pure Turbos..they're rebuilt my turbo. Maybe they can give you some additional insight?
Well, I've sent them a message. I really just hope I can get a new diaphragm. There is surely another one out there that would fit, but I don't know turbo parts well enough to know what it might be.
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