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Old 09-15-2006, 07:19 AM   #1
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NG900 Delivery Pipe Question...

I know the delivery pipes on the NG900s and 99 9-3 were some kind of aluminum, and I have asked this question before, but I wondered how everyone else's were...

Basically, if I drive normal, I see nothing. However, if I really get on the throttle and use the bypass valve to vent a lot of that boost, I see oil around where the bypass valve mounts to the delivery pipe. Also, that piece is somewhat loose. I am not exactly sure if it's supposed to be like this... can anyone tell me what there's feels like? Mine will spin around in a circle, etc etc. Maybe I'll have to somehow weld it tight? I'd be afraid of melting that aluminum though... but I just see oil on my block right there, and I know it's not from the valve cover gasket... it's coming through the induction system... it's also not a lot. I never see weird smoke in my car.

Anyone have any ideas?

Edit, I also am not sure if I have the original turbo and it's at 145k, so I'm sure there could be a bad seal, but as said, no indication from the exhaust and it's boosting quite nicely.
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Old 09-15-2006, 07:25 AM   #2
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I get a little oil in the intake tract whenever i am taking the BPV out to do something....

I think its normal honestly.
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Old 09-15-2006, 08:39 AM   #3
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The oils from the PCV system if you get a catch can for the PCV you will eliminate your oil problem I believe
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Old 09-15-2006, 08:41 AM   #4
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Thats totally normal Thom, it did it with my T25 when I had the PVC valve dumping back into the intake - now that I have the new turbo in the PVC dumps into an oil catch and voila, no more oil in the intake.

So long as its not excessive, you have nothing to worry about!
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Old 09-15-2006, 08:46 AM   #5
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while we're on the subject of catch cans, are they legal for emissions and all that stuff? i cant see why they would be illegal since youre not dumping into the air, but i know some states are weird about changing emissions stuff.
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Old 09-15-2006, 09:02 AM   #6
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I know the guy who does my inspection doesnt so much as pop my hood or put my car on the lift.

"It running aight?"
"Yup"
"Any check engine lights?"
"Nope"
"ok, here you go"
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Old 09-15-2006, 09:12 AM   #7
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How do you go about hooking up a catch can the correct way? I’ve seen a thousand different setups and there all different.
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Old 09-15-2006, 10:20 AM   #8
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Ill snap some pics of mine eventually, but I purchased a 1' peice of 1/2in (I think) heater hose. This hose runs off my PVC valve on the crank case and towards the drivers side. At the opposite end of this hose, I have a catch can which I purchased at Home Depot - designed for a large air compressor, and a small open air filter on the opposite side of the catch can.
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Old 09-15-2006, 01:32 PM   #9
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Yea they should be pretty simple to do. I gotta pick up one here soon. While I was at the track, you could see poofs of smoke while i was shifting, as oil made its way out of my bpv to the manifold.
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Old 09-15-2006, 09:34 PM   #10
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Some people just run the big hose right off the valve cover into the can and that’s it. Some people run it to the can then out of the can back to the intake which is the way I imagine would be the best, keeping a vacuum on the crack case still. I don’t see what the first way would do.
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