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LS1 EGR questions

This is a discussion on LS1 EGR questions within the External Engine forums, part of the LSx Technical Help Section category; Hello. Doing a LS1 swap into a 65 Impala. Replaced the stock manifolds with headers from Street and Performance. These ...

  1. #1
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    65 Impala SS Convertible

    LS1 EGR questions

    Hello.

    Doing a LS1 swap into a 65 Impala. Replaced the stock manifolds with headers from Street and Performance. These have the EGR bungs welded in already.

    My questions...now that I am not using the stock headers, what will I do with the EGR hoses that went to the stock manifolds? I am guessing they are not needed. The hoses go back to a circular valve which also supplies vacuum for the brakes.

    Is there a general rule for which side the EGR valves on the collector face? I know it may sound stupid but I have lots of room since I am frame off now and will not always be that way.

    I can take photos of the part if needed.

    Thanks.

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    Senior Member tatertot91's Avatar
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    Sunset Orange Metalic
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    cap everything off and you should be fine

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    Do they make caps for this or do I just measure them an look for caps that fit?

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    Senior Member tatertot91's Avatar
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    Quote Originally Posted by leon phelps View Post
    Do they make caps for this or do I just measure them an look for caps that fit?
    You can just go to your auto parts store and get vacuum caps that fit.
    Did you already block off the headers?

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    No I plan on using one pair in the header collectors, I am talking about the hoses that go to the front of the headers.

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    Senior Member tatertot91's Avatar
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    You could do what i did and cut a piece of 1/4" aluminum to fit.
    They do sell a kit
    Is this what you're talking about? http://cgi.ebay.com/ebaymotors/LS1-C...Q5fAccessories

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    Member zeetwentyeight's Avatar
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    You might have to tune them out i think as well

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    not the manifold, I have headers now. The stock manifold would not fit with the power steering box. I am speaking of the hoses.

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    Senior Member tatertot91's Avatar
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    Quote Originally Posted by leon phelps View Post
    not the manifold, I have headers now. The stock manifold would not fit with the power steering box. I am speaking of the hoses.
    I'm getting confused, the hoses that go to the back of the driver side head with the little vaccum lines on it?

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    top photo of hose on drivers side



    Connector on that goes to top of manifold



    Top of manifold where hose connects to



    Other end of the hose connection



    Small line from connection.

    Hope this will clear it up. PLEASE remember, I now have headers and the headers have no connection for this hookup. I am trying to eliminate it since I do not want to cut holes in my shiny new headers that are coated.
    Last edited by leon phelps; 07-03-2010 at 12:28 PM.

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    Senior Member tatertot91's Avatar
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    Sunset Orange Metalic
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    as for the small cylinder behind the head, you can take it off and cap off any lines that went to it. The hoses that ran to the manifolds can be removed along with the air pump that they connect to. That whole setup has nothing to do with breaks

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    Dumb question then, what does the third large hose that comes from the pump connect to?

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    Senior Member tatertot91's Avatar
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    Quote Originally Posted by leon phelps View Post
    Dumb question then, what does the third large hose that comes from the pump connect to?
    That cylinder isn't the pump, the pump is mounted in front of the driver side tire and the hose runs along over the wheel well and into that cylinder T. That then goes to the exhaust manifolds.

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    Well, I looked up the GM part number. The valve is called a "W" valve. I see it goes to either a solenoid or a sensor a short distance from the valve. The part has an gas hose in and one out. There is also an orange and pink/black wire connected to it. The small hose then exits the unknown part and goes along the trans/engine mating surface then goes into a small filter then to a "T".

    Any idea what this small valve or solenoid is called? Can I eliminate it too? If I remove it, I guess I would just tape the connector to the harness and leave it out of the way. Would I just get rid of the T on the back of the engine and put an inline coupler or do something else?

    Thanks in advance.

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    Senior Member JayTA98's Avatar
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    From i know about elimainating EGR/AIR system my answer will be yes you can eliminate it. the only thing is that if you dont have the codes deleted by a tune the SES light will be on all the time.

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