GMT 900 Trucks General Discussion 2007 - 2013 Trucks | General Discussion

Jamescb77 semi exciting NNBS turbo build

Old Apr 12, 2018 | 11:10 PM
  #61  
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Learning a little more and little. More and we are getting closer and closer to letting her rip.
Got the front end all the way back together and gave her a bath.
Can't wait to let it eat.
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Old Apr 16, 2018 | 06:32 PM
  #62  
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Been working on nailing down this tune. Everyday we have been making revisions and getting it closer and closer.
Realized tonight I have an oil leak from somewhere. Trans cross member has drips all over it and there seems to be a tube hanging down right there? Anyone know what that is? Hoping its not from the back of the valley cover cause I really don't want to tear everythinf back down.
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Old Apr 16, 2018 | 06:36 PM
  #63  
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Probably just breather tubes. Mine go to the top bolt of the bellhousing. If that's the one you talking about.
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Old Apr 16, 2018 | 06:55 PM
  #64  
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Originally Posted by crashmymax
Probably just breather tubes. Mine go to the top bolt of the bellhousing. If that's the one you talking about.
Thats what I figured but I was hoping ut was something simple that came unplugged lol I'll try and get some pics tomorrow
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Old Apr 17, 2018 | 07:52 AM
  #65  
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those are def breather tubes. like 3/8 hose. mine had two if i remember correctly.
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Old Apr 17, 2018 | 02:05 PM
  #66  
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Thanks guys! When I get home tonight I'm gonna do some more looking and see what I can find. If its not one thing its another lol
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Old Apr 20, 2018 | 05:38 PM
  #67  
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Well guys we still having got he tuning issue figured out. Ut I also have a pretty bad oil leak coming from somewhere. There was zero leaks before so its def something from installing the turbo. I check the oil drain and front cover and all those are good. I believe its either the valley cover or the oil dipstick. I guess I'll start tearing it back down until I find it and get it fixed. So close yet so far away.
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Old Apr 20, 2018 | 05:58 PM
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Sounds like you have about the same luck I do. Always something but eventually you will get all the kinks worked out. Keep at it.
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Old Apr 22, 2018 | 07:50 PM
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Originally Posted by jamescb77
Well guys we still having got he tuning issue figured out. Ut I also have a pretty bad oil leak coming from somewhere. There was zero leaks before so its def something from installing the turbo. I check the oil drain and front cover and all those are good. I believe its either the valley cover or the oil dipstick. I guess I'll start tearing it back down until I find it and get it fixed. So close yet so far away.
How's it coming? Any luck with the oil leak?
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Old May 2, 2018 | 02:41 PM
  #70  
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So I think I got the oil leak fixed. I was tired of keeping an eye on it and having to check it all the tine so I tire it back down. It appeared to be leaking out of the back of the valley cover. Also made sure the dip stick was fully seated. Should be back together this weekend.

In addition we are having some problems with the tune where the commanded afr under boost wants to jump around and even spike back up sometimes. Trying to work through that and if it doesn't fix we will swap to speed density and see if it still does it.
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