08-10 SS Turbocharged General Discussion Discuss the 2008 - 2009 Chevy Cobalt SS Turbocharged. On sale since the second quarter of 2008.

whats this?

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Old 03-06-2010, 07:51 PM
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whats this?

what is the nipple on the hotside by the maf sensor? what connects to it.
Old 03-06-2010, 07:54 PM
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recirc line?
Old 03-06-2010, 08:16 PM
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the hot side by the maf?? Do you mean on the air inlet tube? If so, that is the breather line from off of the valve cover.

"hot side" usually refers to the charge piping between the turbo and the inter cooler. That is unless you have a maf relocation charge pipe set-up. In that case we're talking to different things here
Old 03-06-2010, 08:24 PM
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yeah i knew after i posted it was the wrong piece... but yeah the inlet tube... is there a diagram of that line and where it goes?
Old 03-06-2010, 08:28 PM
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It goes right to your valve cover.. Did you bust off the nipple or something?
Old 03-06-2010, 08:37 PM
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no... im using the lnf turbo system on my 2.2
Old 03-06-2010, 08:39 PM
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Originally Posted by 09blackonblack
no... im using the lnf turbo system on my 2.2
ohh thats to recirc the bov
Old 03-06-2010, 08:42 PM
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ok... so does it go to the valvecover or to recirc the bov?
Old 03-06-2010, 08:43 PM
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LNF turbo setup on a L61? No ****, that's pretty cool.. Sorry if I had misguided you then. I didn't read your sig and assumed you just had an LNF.. Dayta is most likely right about this one then. Do you have any pics so we can confirm it?
Old 03-06-2010, 08:52 PM
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im actually an LAP... but same difference... im so confused with this thing... i need someone to take pics for me... of where the pcv line on the turbo goes. and the thing i was just asking about i will have to loop around to the front of the engine where my valve cover vent is.
Old 03-06-2010, 09:05 PM
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I'm not sure if it helps any, but I have a parts drawing of the LNF turbo/exhaust manifold setup in my pics section that you can reference if it helps any. If you need any other drawings I can see what I have and post them up for you. Unfortunately without pics of your setup, I can't give you an accurate answer to your question but I'm guessing like Dayta said, it's probably vacuum, bypass valve, or recirc related
Old 03-06-2010, 09:26 PM
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i have that blown up and printed in a poster lol... but i need to know where the bpv hose leads to. i thought it went to the nipple i asked about and the pcv line went to the valve cover. but thats what i get for thinking

ok im not positive... but if you use an aftermarket bov you just connect it to the nipple on the intake manifold. does the factory bpv just hook to the intake manifold and thats it?

Last edited by 09blackonblack; 03-06-2010 at 09:26 PM. Reason: Automerged Doublepost
Old 03-06-2010, 09:29 PM
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the bpv should go to a good vacuum source off of your intake manifold.. you might have to get a tee fitting to make that work.. I assume you're not going to be using a bov? Also, are you somehow bypassing the solenoid which controls the waste gate on the k04?
Old 03-06-2010, 09:32 PM
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yeah im running a manual boost controller to bypass that and control my boost levels
Old 03-06-2010, 09:46 PM
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ok nice.. Jesus the server is being slow for me tonight.. That's funny how you answered my question via an edit while I was waiting for my last comment/question to post
Old 03-06-2010, 10:03 PM
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yeah its really slow for me too... my cell is faster than the computer. but do you have a diagram or a picture of the front of the engine without the engine cover? all the google pics have that cover on them. but the bpv makes no sense to me.... how does it recirc if the vacuum from the intake pulls it open? where does the extra pressure go to?
Old 03-06-2010, 10:17 PM
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Basically instead of releasing access boost atmospherically like a BOV it recirculates the blow off into the intake side of the system and reuses the air.

I am loading a parts breakdown for you as we speak. Hopefully it is usefull.. If not then I can take a pic of my motor for you if you'd like
Old 03-06-2010, 10:20 PM
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ok so it just takes the pressure from the output side of the turbo and routes it back through the turbo to the input?
Old 03-06-2010, 10:28 PM
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pretty much.. and with a cai you get that bov pssshhh sound that comes through the actual cai.. not quite as loud but it still sounds cool. The breakdown is loaded if you want to check it out. It might be a little on the small side so hopefully you have GREAT eye site.. lol
Old 03-06-2010, 10:31 PM
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i was already looking at it in your pictures

if its not too much trouble... can you tell me where the pcv tube on the turbo goes to? would it tee into the line that goes from the valve cover to the intake?
Old 03-06-2010, 11:01 PM
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sorry for the delay.. I'm multitasking over here..

The PCV goes directly to the valve cover... that should be in your exhaust side parts breakdown that you have a blown up poster of actually
Old 03-06-2010, 11:11 PM
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The nipple on the inlet tube is for routing fresh air to the crankcase for the PCV system. The hose that connects to it runs to the valve cover. The LNF valve cover has a second nipple with a hose running to the inlet of te turbo. If you have a vent on the front of the valve cover, you could run it to the turbo and plug the nipple on the intake tube. Otherwise, plug both of them and put a small breather filter on your valve cover vent tube.
Old 03-07-2010, 12:15 AM
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awesome thanks matt! i pull plug the small nipple and run the hose around the engine to the turbo pcv nipple... seems the easiest. i think i have it all figured out now. i hope anyways.

Originally Posted by 09CobaltSS1
sorry for the delay.. I'm multitasking over here..

The PCV goes directly to the valve cover... that should be in your exhaust side parts breakdown that you have a blown up poster of actually
thanks for all your help and the picture. if i have any more questions i will send you a pm if thats ok? but before i go to bed... i talked to psychocam and he tapped a vacuum nipple on the intake manifold... should i do the same? or can i get away with using the evap or brake booster line?

Last edited by 09blackonblack; 03-07-2010 at 12:15 AM. Reason: Automerged Doublepost
Old 03-07-2010, 12:26 AM
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You can drill and tap the manifold if you want to go that route. Whether you tap off of the mani or branch off of an existing line just be sure to be as far up in the vaccum stream as possible (closest to the manifold).. If you can't tee off of something then the brake booster works as well, seeing as how that HAS to have solid vaccum.

Last edited by 09CobaltSS1; 03-07-2010 at 01:04 AM.




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