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hummer H1 headers and crossover Q??

Discussion in '1982-Present GM Diesel' started by desertrat67, Sep 1, 2006.

  1. desertrat67

    desertrat67 Hawk Driver

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    Has anyone put the hummer headers (6.2 and 6.5 na diesel) and exhaust crossover into an 80's truck? I am contemplating this since i am trying to clock my t-case up and the right side exhaust would be in the way. The crossover is smoothly bent and runs dirrectly under the torque converter cover joining into the left side exhaust. It has a heat shiled welded onto it between the converter cover. All three mounting points on the x-over are bolt on using 3 bolts each making it easy to get it out of the way if you need to access the tranny front or engine rear.
     
  2. desertrat67

    desertrat67 Hawk Driver

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    this is a pic of the right side, the left curves downward.

    8c_12.jpg
     
  3. kennyw

    kennyw N9PHW Premium Member

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    Looks like the right side will go straight into your firewall...
     
  4. BKinzey

    BKinzey 1/2 ton status

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    Wanna try? I've got a like new set I'll sell you for $50 + shipping. I was going to use them until I picked up a turbo. I've never tried to fit them and my motor's out now.


    9/12/06 These are sold, sorry.
     
    Last edited: Sep 12, 2006
  5. kennyw

    kennyw N9PHW Premium Member

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    Thats ok, don't need them.
     
  6. BKinzey

    BKinzey 1/2 ton status

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    Actually I was talking to DesertRat:D:D
     
  7. MEK5

    MEK5 1/2 ton status

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    If DesertRat doesnt want them I will buy them,been looking for some of those!

    Thanks
     
  8. desertrat67

    desertrat67 Hawk Driver

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    MEK5, go ahead if oyu want them. I am a little way away from that part of the project. Just trying to find info on the fitment.
     
  9. dieselponyexpress

    dieselponyexpress 1/2 ton status

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    Only one side will fit in c/k trucks. On the other side (passenger side iirc) the framerail is in the way.

    Walter
     
  10. BKinzey

    BKinzey 1/2 ton status

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    Look at the above pic. If the frame is in the way it has to be the driver's side:wink1:

    So MEK5, did they fit? Firewall or frame in the way? Possibly both?
     
  11. 79k20350

    79k20350 3/4 ton status

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    Ummm...no that would ve the passanger side, the side facing the camera. it comes out too wide
     
  12. muddybuddy

    muddybuddy 3/4 ton status

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    what would be a benefit of running these headers vs stock style?
     
  13. BKinzey

    BKinzey 1/2 ton status

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    Same idea as putting headers on a gasser. Smooth pipes for less restriction. Although as far as quality goes the HMMVs I had were pretty crappy built. If you looked into the collector you could see the individual tubes jutting 1/2" to 1" into the collector.
     
  14. MEK5

    MEK5 1/2 ton status

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    Wow,I must have missed this months ago.I decided to see if the headers would work since my trucks all apart for new exhaust,transfer,etc.etc.

    I did a search and read that one of the headers would hit the frame rail and found this to be correct.The driverside hangs to low and wide and will hit the frame rail/motor mount pedestal.
    The pass side appears like it will clear the frame but I had to remove the heat sheild to get it in place and the flange is just about touching the starter solenoid.If you remove the flange and put a elbow there I think you could get this side to work out with no firewall issues.

    I used a core motor I have on a stand to mock this up and then compared measurements to the truck.Heres some pics to better show how the stock manifolds sit compared to the headers.I decided not to use them,to many headaches!

    IMG00005.jpg

    IMG00006.jpg

    IMG00007.jpg
     

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