how to get new down pipe in (OBS) - Diesel Truck Forum -
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post #1 of 7 (permalink) Old 10-23-2007, 05:26 PM Thread Starter
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how to get new down pipe in (OBS)

i cant get the new one in i tried going from the top and the bottom just cant get it in

96 F350 crew cab long bed. DIY green filter intake 7 inch stacks. stock height .275,000 and still truckin
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post #2 of 7 (permalink) Old 10-23-2007, 05:58 PM
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is it a 2 peice???
If so put the top in from the top and the bottom in the from bottom.
You'll probaly have to pound the **** out of the firewall to get it so it don't rub. Mine is rubbing right now and the sound is aweful

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post #3 of 7 (permalink) Old 10-23-2007, 06:47 PM
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on mine i took rear crossmember off the transmission and let it down a little to gain some room to get it slid in. i also had to beat a body seam down on the fire wall to keep it from rubbing.

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post #4 of 7 (permalink) Old 10-23-2007, 08:11 PM
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You might make a couple of cuts in the lip of the firewall to make it easier to bend back so that the pipe will fit. Not all trucks require this though. It depends on how far up or back the cab is mounted. I've heard of using a jack and 2x4 to bend the lip if you don't want to pound it.
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post #5 of 7 (permalink) Old 10-24-2007, 01:27 AM
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I would recomend NOT cutting the seam. You will just open it up for rust by doing so and it is not needed. The simplest way to do it is use about a 3' 2X4 and bend the firewall in. You can pry from the back of the head to the firewall from the top and the down pipe and the firewall from the bottom. I have installed a few this way and it works great and you don't have to worry about your heat insulation being cut up or your pinch weld rusting out down the road.

The easiest tool to use is a port-a-power with a duck bill attchment and sometimes a small 6" or so long chunk of 2X4. put it between the transmission bell housing and the fire wall and push the firewall where the down pipe hits.

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post #6 of 7 (permalink) Old 10-24-2007, 02:38 AM
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you could also use a small scissor jack to push the firewall back

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post #7 of 7 (permalink) Old 10-25-2007, 02:04 AM Thread Starter
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i got it guys thanks for all the help

96 F350 crew cab long bed. DIY green filter intake 7 inch stacks. stock height .275,000 and still truckin
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