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whtats this?

Discussion in 'The Garage' started by 84gmcjimmy, Nov 6, 2004.

  1. 84gmcjimmy

    84gmcjimmy 1 ton status

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    I unbolted the passanger side exhaust, and between the pipe and the manifold was this do-hicky...

    [​IMG]

    [​IMG]

    It looks like there is suposed to be some kind of linkage attached to it to open and close the thing /forums/images/graemlins/confused.gif
     
  2. darkshadow

    darkshadow 1 ton status

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    yeah it blocks off some of your exaust, its a erg, or choke thing i think cant remember.
    some one will chime in.
     
  3. sled_dog

    sled_dog 1 ton status

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    choke thing. It closes when the rig is cold and forces that sides exhaust throught he egr crossover to the other side exhaust. In the process it makes warm up occur faster. I always remove them, don't trust an old rusty hunk of metal like that to stay open. Sometimes you can sit there and watch it open and close.
     
  4. 84gmcjimmy

    84gmcjimmy 1 ton status

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    So I should just huck it?
     
  5. darkshadow

    darkshadow 1 ton status

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    you putting factory exaust back on?? it not chuck it, if yes mabey keep it for leanth referance so you could replace it with pipe.


    see how far you can throw it into the woods /forums/images/graemlins/thumb.gif
     
  6. sled_dog

    sled_dog 1 ton status

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    Depends, are you puting headers on the rig? Does it seem to be sticky if you try and operate it by hand? If youa re going to reuse the y pipe you may HAVE to keep it. If it operates smoothly its a good little feature.
     
  7. 1979jimmy350

    1979jimmy350 1/2 ton status

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    it would help you warm up faster in the winter by heating up the intake manifold. I would keep it around those run about 200 dollars from LMC
     
  8. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    Its an exhaust brake! /forums/images/graemlins/smirk.gif /forums/images/graemlins/whistling.gif
     
  9. 84gmcjimmy

    84gmcjimmy 1 ton status

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    [ QUOTE ]
    Depends, are you puting headers on the rig? Does it seem to be sticky if you try and operate it by hand? If youa re going to reuse the y pipe you may HAVE to keep it. If it operates smoothly its a good little feature.

    [/ QUOTE ]

    woops sorry, I forgot to say the blazer had dual exhuast...
    It doesn't feel stick, where the little thing is for where I thought linkage would attach to, I can move it with that fairly good.
     
  10. K10ANDYKHAMNIC

    K10ANDYKHAMNIC 1/2 ton status

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    its called a heat riser . it helps it run better when cold .
     
  11. camok10

    camok10 1/2 ton status

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    a couple of blurry photographs. /forums/images/graemlins/whistling.gif /forums/images/graemlins/histerical.gif
     
  12. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    i just noticed, did you know you have a np205 attached to your th350?

    [​IMG]

    its a 1980 model because it a slip yoke.
     
  13. 84gmcjimmy

    84gmcjimmy 1 ton status

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    seriously? Its a 205? /forums/images/graemlins/eek.gif
     
  14. 84gmcjimmy

    84gmcjimmy 1 ton status

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    I thought it was a np208. what is the shift pattern for a 205? Maybe thats why it was hard to shift for me. /forums/images/graemlins/thinking.gif
     
  15. 84_Chevy_K10

    84_Chevy_K10 Banned

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    4LO
    Neutral
    2HI
    4HI
     
  16. TruckNutzDude

    TruckNutzDude 1/2 ton status

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    It's funny that you pointed that out.. I didn't even pay attention to the part in his hand, I went straight to the drivetrain. Nice piece of iron you've got there Steve... the TH350/205 adapters are getting rare, as are 27 spline 205 cases. /forums/images/graemlins/thumb.gif
     
  17. 84gmcjimmy

    84gmcjimmy 1 ton status

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    [ QUOTE ]
    It's funny that you pointed that out.. I didn't even pay attention to the part in his hand, I went straight to the drivetrain. Nice piece of iron you've got there Steve... the TH350/205 adapters are getting rare, as are 27 spline 205 cases. /forums/images/graemlins/thumb.gif

    [/ QUOTE ]

    So, should I keep the np205, and find a np208 to swap in to sell the th-350 with, or what should I do?

    [ QUOTE ]
    4LO
    Neutral
    2HI
    4HI

    [/ QUOTE ]

    Okay thanks!
     
  18. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    you wouldn't be able to swap a 208 on the th350, the output shaft is too short, btu you can swap a np203 onto it and sell it or you can just sell the th350 alone.
     
  19. 84gmcjimmy

    84gmcjimmy 1 ton status

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    ooh darn. Never thought of that. Okay thanks!
     
  20. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    It's called an EFE valve. It closes during cold starts and forces warmed exhaust air through a crossover in your manifold to help your engine warm up faster.
     

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