Changing Throttle bodies on my N*? Proceedure!
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Northstar Engines and System Technical Discussion Discussion, Changing Throttle bodies on my N*? Proceedure! in Cadillac Engine Technical Discussion; Im almost ready to change throttle bodies with the one i made for my N*. I was just wondering what ...
  1. #1
    1fastSTS is offline Cadillac Owners Fanatic
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    Changing Throttle bodies on my N*? Proceedure!

    Im almost ready to change throttle bodies with the one i made for my N*.
    I was just wondering what i would need to do this.

    Get a Throttle body gasket from the dealer, is there a gasket for where the mounting plate meets the manifold as well?

    and i was thinking of lining the gasket with some permatex sealer . I dont know th setup of the N* until i take it off,but im just assuming its gaskets like any other car.

    any info would help. thanks.

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  3. #2
    Pjs's Avatar
    Pjs
    Pjs is offline Cadillac Owners Fanatic
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    Re: Changing Throttle bodies on my N*? Proceedure!

    You don't say what year your N* is. This is the factory procedure for a 95.

    Remove or disconnect...
    Neg batt cable
    IAT sensor connector
    Crankcase vent pipe at air intake duct
    Air intake duct with air cleaner housing
    TP sensor and ISC acctuator electrical connectors
    Vacuum manifold at throttle body
    Cruise control cable at throttle body
    Cruise control servo vacuum hoses and electrical connector
    Cruise control servo and bracket. Lay aside with transaxle shift cable attached
    Accelerator cable at throttle body and ISC actuator bracket
    Injector harness, transaxle vent hose and vacuum lines at ISC actuator bracket
    Throttle body mount bolts
    Throttle body coolant hoses at throttle body
    Throttle body and O-ring seal

    The throttle body is held by 4 screws to the intake manifold with a spacer in between. O-rings are on both sides of the spacer. I would definitely get new ones if your taking it apart. I would also recommend using vasoline to hold the new O-rings in place.

    Now...I'm curious...why did you make a new throttle body?

  4. #3
    1fastSTS is offline Cadillac Owners Fanatic
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    Re: Changing Throttle bodies on my N*? Proceedure!

    i have a 99 sorry.
    damn this is gonna be a 5 hour project.

    i didnt wanna spend 360 plus 100 core charge for RSM. so i made my own. ported it out, added new throttle blade, match ported the mounting plate.

  5. #4
    Pjs's Avatar
    Pjs
    Pjs is offline Cadillac Owners Fanatic
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    Re: Changing Throttle bodies on my N*? Proceedure!

    While it sounds like a lot of work, it's really not that bad. The hardest thing in my opinion is getting the 2 bottom bolts out of the TB. It helps to have a torx driver the appropriate size as opposed to a torx socket that fits on a driver.
    I really don't know if a 99 is easier than this, you may want to invest in a factory service manual. Definitely worth the $$$

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