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Discussion Starter · #1 ·
Here are some pics of the install as a SRI. I think I'll leave it that way until after winter, then convert to CAI.

Thanks for lookin'


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California?























It looks like the supply line for an air pump. It an emission piece that not common, to be honestly California is the only state that I know of that uses them. You can probably get a PCV breather filter and attach it to the inlet.
 

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That is for SAI Secondary Air Injection

Here is some info on it:

Halfcent said:
Certain late production model 2006 Cobalts with L61 (2.2L) engines had a system called Secondary Air Injection (SAI) added to it. This is an emmisions control system that added fresh air to the exhaust manifold to help burn off unused gases from the engine prior to entering the catalytic converter. The issue caused problems for people wanting to use aftermarket intakes and manifolds due to the lack of provisions for the system. At present, K&N is the only aftermarket intake system that provides for SAI. There are no aftermarket headers at this time.

SAI is not Exhaust Gas Recirculation (EGR). It is actually the exact opposite. SAI adds fresh air to the exhaust. EGR routes exhaust gas back into the induction. While the Ecotec originally had a casting provision in the cylinder head for EGR, it was never used on any known models. The provision was deleted in the 2005 model year, however certain parts of the orginal casting still remain evident on the current production head.

Here are older threads on the topic:
http://www.cobaltss.net/forums//showthread.php?t=34907
http://www.cobaltss.net/forums//showthread.php?t=38487
http://www.cobaltss.net/forums//showthread.php?t=33019&highlight=EGR
http://www.cobaltss.net/forums//showthread.php?t=31688&highlight=EGR
http://www.cobaltss.net/forums//showthread.php?t=29879&highlight=EGR
http://www.cobaltss.net/forums//showthread.php?t=30939&highlight=EGR
http://www.cobaltss.net/forums//showthread.php?t=29856&highlight=EGR
http://www.cobaltss.net/forums//showthread.php?t=29543&highlight=EGR
http://www.cobaltss.net/forums//showthread.php?t=29500&highlight=EGR

If you have the system, your exhaust manifold will have a mounting provision right on top center for the air valve.


And you will have an extra line coming off of your air box.


The system can be best explained with some pictures. Heres the Patriot Performance cylinder head with some highlighting:


You can see on top the old casting for EGR. It was never used. On the Cobalt, and all 2005 and later Ecotecs, this was removed. However, the entry passages are still there in the manifold flanges. They don't go anywhere, they are dead end holes. They probably left them there so they wouldn't have to change the manifold flange designs.

Air is circulated through the actual flange of the exhaust manifold. Here's what it looks like:


It gets around the exhaust ports via the cross over passages in the head, and is then directed at the back of the exhaust valves via the passages in the head.
---------------------------------------------------------------------------------------

I would like to qoute a post that is later in the thread:


This technique has been verified as a legitimate method of deleting SAI from your car in a completely legal way. You would require either an aftermarket intake and exhaust manifold, or a way to block off the plumbing on the stock parts, but it does work.
 

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PursuitGT said:
That is for SAI Secondary Air Injection

Here is some info on it:

Halfcent said:
Certain late production model 2006 Cobalts with L61 (2.2L) engines had a system called Secondary Air Injection (SAI) added to it. This is an emmisions control system that added fresh air to the exhaust manifold to help burn off unused gases from the engine prior to entering the catalytic converter. The issue caused problems for people wanting to use aftermarket intakes and manifolds due to the lack of provisions for the system. At present, K&N is the only aftermarket intake system that provides for SAI. There are no aftermarket headers at this time.

SAI is not Exhaust Gas Recirculation (EGR). It is actually the exact opposite. SAI adds fresh air to the exhaust. EGR routes exhaust gas back into the induction. While the Ecotec originally had a casting provision in the cylinder head for EGR, it was never used on any known models. The provision was deleted in the 2005 model year, however certain parts of the orginal casting still remain evident on the current production head.

Here are older threads on the topic:
http://www.cobaltss.net/forums//showthread.php?t=34907
http://www.cobaltss.net/forums//showthread.php?t=38487
http://www.cobaltss.net/forums//showthread.php?t=33019&highlight=EGR
http://www.cobaltss.net/forums//showthread.php?t=31688&highlight=EGR
http://www.cobaltss.net/forums//showthread.php?t=29879&highlight=EGR
http://www.cobaltss.net/forums//showthread.php?t=30939&highlight=EGR
http://www.cobaltss.net/forums//showthread.php?t=29856&highlight=EGR
http://www.cobaltss.net/forums//showthread.php?t=29543&highlight=EGR
http://www.cobaltss.net/forums//showthread.php?t=29500&highlight=EGR

If you have the system, your exhaust manifold will have a mounting provision right on top center for the air valve.


And you will have an extra line coming off of your air box.


The system can be best explained with some pictures. Heres the Patriot Performance cylinder head with some highlighting:


You can see on top the old casting for EGR. It was never used. On the Cobalt, and all 2005 and later Ecotecs, this was removed. However, the entry passages are still there in the manifold flanges. They don't go anywhere, they are dead end holes. They probably left them there so they wouldn't have to change the manifold flange designs.

Air is circulated through the actual flange of the exhaust manifold. Here's what it looks like:


It gets around the exhaust ports via the cross over passages in the head, and is then directed at the back of the exhaust valves via the passages in the head.
---------------------------------------------------------------------------------------

I would like to qoute a post that is later in the thread:


This technique has been verified as a legitimate method of deleting SAI from your car in a completely legal way. You would require either an aftermarket intake and exhaust manifold, or a way to block off the plumbing on the stock parts, but it does work.

Otherwise know as an Air Pump. :D
 

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Discussion Starter · #7 ·
Well, I stuck a Crank Case breather on said extra hose and we'll see how it goes. No CEL yet, going to drive it around a little while and see if it pops on. If it does, I'll just re-install the stock air intake, sell the Injen, and buy the K&N.
 

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Discussion Starter · #9 ·
Drove around, no CEL. Looks like that pipe is no big fuss, the filter I stuck on there should do. Going to convert from SRI to CAI over the weekend, will post pics.
 

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iixnullxii said:
Well, I stuck a Crank Case breather on said extra hose and we'll see how it goes. No CEL yet, going to drive it around a little while and see if it pops on. If it does, I'll just re-install the stock air intake, sell the Injen, and buy the K&N.
i was thinking about it and i just came to this thread to post that. damn you beat me
 
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