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Old 10-21-2021, 08:25 AM   #1
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Replacing exhaust flex hose ISL 400

Not sure if this should be in the Spartan forum or here.

I need to replace the flex hose between the turbo and muffler. Would like to tackle the job myself as I was told it is not too hard, but tight in places and held on by hose clamps. Cummins estimates half a day labor. Seems excessive. Ouch. I already cut them a pretty large check.

Has anyone here done this replacement? Feedback appreciated.

Thanks
Jake
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Old 10-21-2021, 09:08 AM   #2
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Do you have pics, might help? What coach and model year?

I just replaced the exhaust pipe from turbo thru the flex hose going under between engine and trans.
I had to have a helper as one had to be attaching the turbo connection while I was holding and lining up the pipe underneath.

Feed the flex pipe on first using the other pipe as lever arm before attaching that. Just leave it loose until it's in correct alingment.
You probably need to have another pipe loose also to be able to twist and pull the old flex out.

The flex pipe is way too stiff to try to put in between solid pipes.
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Old 10-21-2021, 09:15 AM   #3
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I would have to rate it as very easy to replace. The flex pipe is available from large truck supply houses or from Spartan. My experience with truck houses is that they sell by the foot and will have to be cut. Spartan will sell the exact length for the section you are replacing.
I greased the inside of the clamps to make them easier to move around when fitting together.
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Old 10-21-2021, 09:21 AM   #4
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Thanks for the quick replies. This is a 2002 American Eagle. i will pop the interior access panel and take a few pics today.
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Old 10-21-2021, 01:46 PM   #5
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Quote:
Originally Posted by rvbiker45 View Post
I would have to rate it as very easy to replace. The flex pipe is available from large truck supply houses or from Spartan. My experience with truck houses is that they sell by the foot and will have to be cut. Spartan will sell the exact length for the section you are replacing.
I greased the inside of the clamps to make them easier to move around when fitting together.


It does sound like it isnít too hard. I wonder why Cummins service expects 1/2 day for it. That is a bit over the top.
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Old 11-09-2021, 11:47 PM   #6
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It wasnít too hard. Found a replacement 24inch hose. Cut it down to 20 inches like the OEM hose. Much cheaper. Installed and replaced the muffler hangers also. All good.
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Old 11-10-2021, 11:30 AM   #7
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Quote:
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It wasnít too hard. Found a replacement 24inch hose. Cut it down to 20 inches like the OEM hose. Much cheaper. Installed and replaced the muffler hangers also. All good.
Is the new on SS? If not, you'll be doing it again in a year or two. It's worth the extra money to get SS.
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Old 11-10-2021, 01:40 PM   #8
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Replacing exhaust flex hose ISL 400

Galvanized. Iíll keep an eye on it and replace with stainless when itís life is up.
Thx
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Old 11-11-2021, 12:23 AM   #9
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Get it right the first try, the flex pipe ends don't seal right after once being removed. Mine has a small leak on each end, evidenced by the thin black streak on the solid pipes. The clamps have a torque value too.
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Old 11-11-2021, 01:38 PM   #10
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Galvanized. Iíll keep an eye on it and replace with stainless when itís life is up.
Thx
A prior owner had had ours replaced with galvanized steel flex pipe. It lasted us about a year, though I have no idea how old it was when we go the coach. Prior experience in automotive applications has been about a year as well. The guys at Fleetpride tell me the SS flex pipe should last several years.
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