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Thread: Official NBS 4.3v6 to GEN 3 V8 swap Guide

  1. #121
    Join Date
    Aug 2008
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    North Texas
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    12,078
    The picture was spot on David. Shows how a dummy parts guy at most dealers would mess it up and say it's not available.

  2. #122
    Join Date
    Dec 2007
    Location
    wichita falls, tx
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    3,067
    hey nate...can u look and see if its the same part# for that brake booster, mine on my L92 intake is broken and im gonna have to replace it and i need a part number.
    ↓↓↓click pic to go to garage↓↓↓

    408, WCCHL92s, nelson tune,4L80e 3600 Circle D,
    Intro Radicalli's

  3. #123
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    12559760

  4. #124
    Join Date
    May 2009
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    hot & windy
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    so where did y'all tap in the coolant hose that's supposed to go from throttle body to the radiator?

    pics would help as well
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

  5. #125
    Join Date
    Aug 2009
    Location
    Humble, TX
    Posts
    91
    Quote Originally Posted by zebra View Post
    so where did y'all tap in the coolant hose that's supposed to go from throttle body to the radiator?

    pics would help as well
    i've heard of people tapping into the hose that connects the reservoir to the radiator. i'm connect mine into the heater hose coming off of waterpump

    * 2002 Chevy Silverado RCSB w/ 4.3 to 5.3 swap
    Installed: McGaughys full 2/4|HD hood/Z71 Airdam|Circle D Built Trans & 3200 stall|34" fans/radiator|True Trac w/ 3.73s|V8 Swap w/ Milled Heads and Comp valvetrain|Custom Grind 22x/23x Cam|Pacesetters LTs & ORY|Magnaflow|Wheatley Tune
    Future Mods: Paint (Sunset Orange Metallic), milled 243s, possibly a 6.0 with either turbo or procharger
    * 2008 GMC CC Texas Edition: stock with CAI

  6. #126
    Join Date
    Aug 2009
    Location
    Humble, TX
    Posts
    91
    I think i almost have everything for swap.... my cam is coming in on tuesday then i'm installing that. i need to find a harness this week and maybe get a starter, then order pushrods

    Is there anything else that i should know bout that others ran into? i'm aiming for the swap to be in the first or second week november

    * 2002 Chevy Silverado RCSB w/ 4.3 to 5.3 swap
    Installed: McGaughys full 2/4|HD hood/Z71 Airdam|Circle D Built Trans & 3200 stall|34" fans/radiator|True Trac w/ 3.73s|V8 Swap w/ Milled Heads and Comp valvetrain|Custom Grind 22x/23x Cam|Pacesetters LTs & ORY|Magnaflow|Wheatley Tune
    Future Mods: Paint (Sunset Orange Metallic), milled 243s, possibly a 6.0 with either turbo or procharger
    * 2008 GMC CC Texas Edition: stock with CAI

  7. #127
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    I've tapped mine into the water pump body right next to the heater hose.headers022.jpg picture by redheartbeat - Photobucket
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  8. #128
    Join Date
    May 2009
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    hot & windy
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    so it don't really matter too awful much where it goes?

    i don't really feel like tapping into the pump itself, but i can do it to the reservoir->radiator hose or either of the heater hoses going to the firewall, right?
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

  9. #129
    Join Date
    Oct 2009
    Location
    Mesa
    Posts
    25
    Hey guys I know this thread has been going on for quite a while but I have decided to go ahead with this swap for my truck (1999 GMC Sierra 4.3 1500 4wd for a 2002 Yukon 5.3) and have already bought the motor and most of the parts i need but have already hit a problem with the intake and the EGR valve. The intake on the motor I bought does not have the port for the EGR Hose. Any suggestions? or Comments? I am worried about emissions and will get another intake if i have to...

  10. #130
    Join Date
    Oct 2009
    Location
    Mesa
    Posts
    25

    EGR Valve

    You can see the plastic where it is supposed to go. I just don't want the AZ emissions to fail me or the engine to throw some code that it lost contact with the EGR or something because it is not plugged in
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