Removing Flex Pipe on Up-Pipe and Y Pipe - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 28 (permalink) Old 11-27-2006, 10:30 PM Thread Starter
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Removing Flex Pipe on Up-Pipe and Y Pipe

Has anyone completely removed all the flex pipe both on the Y pipe and the up-pipe since this seems to be a problematic area on these trucks. :Thumbup:

Aaron - 2004 F350 "Offroad Edition"

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post #2 of 28 (permalink) Old 11-28-2006, 02:39 AM Thread Starter
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Could this be done w/out any ill effects???

What exactly is the flex pipe in there for???

Aaron - 2004 F350 "Offroad Edition"

2003 F250 "Pulling Truck"
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post #3 of 28 (permalink) Old 11-28-2006, 02:47 AM
 
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i am sure you could get away without it, but i don't know, i am sure it's in there to either alow for expansion when it gets hot or so the lil movement doesn't crack the pipes over time
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post #4 of 28 (permalink) Old 11-28-2006, 02:54 AM
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if you remove the flex pipes completly you will find the pipes will start to crack, the up pipes need the expansion joint for that reason, for expansion.

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post #5 of 28 (permalink) Old 11-28-2006, 03:00 AM
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Without the flex pipe and with the different expansion rates of dis-similar metals I am pretty sure the stress created would not be of advantage. Possible damage would be a high risk factor.

With the being said, I do beleive you might get by with some stainless steel pipes with slip joints, that is one pipe belled out so the other would fit snuggly inside it. Two problems come to mind in a flash, leakage and corrosion inside the slip joint. We used to make headers for race cars in section that could be installed a section at a time, each slip joint had a tab welded to each of the two pipes in the joint that would match up and be drilled for a bolt and nut as a fastening device.

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post #6 of 28 (permalink) Old 11-28-2006, 03:16 AM
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What if the slip-joint idea was coated with something to prevent rust (powercoat or something) and then had a larger expansion joint welded over the top. You would still have the smooth transition(spelling) of a slip joint and would have the pressure seal of the expansion joint. We use a simalar design on the aircraft called a "wiggins coupling". We use rubber o-rings so that wouldn't work for the up pipes, but works great for our oil and fuel. And as most of you probably know, these jets flex a lot and they never break.

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post #7 of 28 (permalink) Old 11-28-2006, 06:56 AM
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we could use headers, like the set available for the 7.3



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post #8 of 28 (permalink) Old 11-28-2006, 07:00 AM
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Diesel Innovations makes real nice steel braided flex-jointed up-pipes for the 7.3, perhaps Dave could be convinced to have some built for the 6.0?

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post #9 of 28 (permalink) Old 11-28-2006, 07:03 AM
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Quote:
Originally Posted by banksforddiesel99
there is a set of prototype headers out.............. ive seen pics
yea well ive seen pics of christina augulaira, britney spears, among others naked... dosent mean they were REAL!
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post #10 of 28 (permalink) Old 11-28-2006, 07:13 AM
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nick huh?

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