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Help with bending header?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by JST12, Mar 27, 2001.

  1. JST12

    JST12 1/2 ton status

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    After lowering my xfer case, I now have a clearance problem with my right exhaust header coming too close to my front spring shackle. I need to move the header collector about a 1/2 inch inward. I am thinking of heating the collector tube with one of those small hand torches and using a pry bar to pull it over a tad. Has anyone done this, and is there any advice? Thx, JT
     
  2. muddin4fun

    muddin4fun 3/4 ton status

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    You might want to talk to a medal fab place or a good experiance welder before you tackle that.

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  3. Depdog

    Depdog 1/2 ton status Author

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    Well, I can tell you how I did it. I dont think its recomended, but it works. I bolted mine to the engine block tight, then I used a cum along and wrapped it around the pipe and the other sided to the opposite frame rail and cranked till it was bent enough to clear, I also bent mine up some by lifting it with a floorjack while bolted on.

    Like I said, I dont think its recommended, but it worked for me.

    Depdog

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  4. ftn96

    ftn96 1/2 ton status

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    I dont think your little hand torch is really going to get that collector pipe hot enough. My collector rubs on my front driveshaft. You may wanna go to a local muffler shop and see if they can cut and weld the pipe for your needs.

    Will work for beer, parts and tools.
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  5. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Hey Dep, that might not be recommended but its more or less what I did as well. I did heat mine up a little but got nervous with all the fuel lines and wires in the vicinity and just pried the header over while it was bolted up and in place... worked for me too. I would guess the pipes themselves are what bends a bit.

    Rene

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  6. Rob 85K5

    Rob 85K5 1/2 ton status GMOTM Winner

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    I did the same thing at first and then would have a nice metallic clang clang against the shackle when turning a corner a month later and then have to do it again. If you have newer headers that aren't to thin then they might last after bending them. I got tired of it after a while and bought some hedman headers for a straight axle 4X4 Chevy 73-91 and have no problems. The collector is moved up 4-6 inches and clears everything nicely. Not sure if they have the same for a 71

    Rob 85K5

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  7. JST12

    JST12 1/2 ton status

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    Thanks for the input. I have aluminum heads so I'm a little wary of bending the header with a come-along. I don't have any fuel in the new lines, or for that matter any fenders , wires etc.. near the header. Still working on my resto, so there is plenty of room to torch the header from above and below. Anyone else done this? JT
     

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