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Old 01-19-2023, 11:47 AM   #1
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Replacing (or splicing) fuel lines on an International 3800 T444E

I’m not sure if this bus was manufactured this way or if somebody did a repair and decided this was a good idea, but these two fuel lines (one from the water separator to the filter bowl and, I think, a return from the bowl to the fuel tank) were zip tied together. They finally rubbed each other enough to cause a fuel leak.

Anyway, I contacted my usual mechanic, but they seem to be so overbooked that I couldn’t even get a diagnosis of what needs to be done. So I’m wondering if this is something that can be repaired with a splice? If not, is it something that’s easy enough that I, who has a fair amount of mechanical knowledge, can do myself? Or, is it something that can be patched up with something like flex tape (maybe this is a stupid idea?) until the mechanic can work on it?
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Old 01-19-2023, 12:17 PM   #2
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is that a copper line?
i would replace the line but you can fix it with a coupling.
pull the line and go to the store and match size and fitting type.
or some parts stores like napa can make a new line or help you with the correct fitting.
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Old 01-19-2023, 12:22 PM   #3
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is that a copper line?
i would replace the line but you can fix it with a coupling.
pull the line and go to the store and match size and fitting type.
or some parts stores like napa can make a new line or help you with the correct fitting.
It’s actually just a rubber line (I believe). Not one of the high pressure lines.
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Old 01-19-2023, 12:25 PM   #4
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napa or a hydraulic shop can make you a new one.
my oreillys does it as well.
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Old 01-19-2023, 12:30 PM   #5
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napa or a hydraulic shop can make you a new one.
my oreillys does it as well.
Ok, and you’re talking about a whole fuel line? So basically, I should disconnect it and then bring it down there.
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Old 01-19-2023, 12:34 PM   #6
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yes sir or they might splice it for you.
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Old 01-20-2023, 03:24 AM   #7
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I wouldn't ever risk splicing or mending any hose containing flammable fluids near a hot engine! The fewer the potential points of failure, the better; every joint or connection is a PPoF. Hoses are cheap in the big scheme of things. And if it's close to the engine, protect it inside a silicone heat-resistant sheath such as Techflex Fireflex so it doesn't dry out and crack prematurely.

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Old 01-20-2023, 07:40 AM   #8
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I wouldn't ever risk splicing or mending any hose containing flammable fluids near a hot engine! The fewer the potential points of failure, the better; every joint or connection is a PPoF. Hoses are cheap in the big scheme of things. And if it's close to the engine, protect it inside a silicone heat-resistant sheath such as Techflex Fireflex so it doesn't dry out and crack prematurely.

John
yea if you attempt a splice here your asking for trouble i dont think that that hose is original as the factory would have clamped it. if you have doubt about your ability maybe get a mech as here you have a 50 / 50 chance of good info
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Old 01-20-2023, 07:54 AM   #9
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those arent "hoses" they are 3/8 nylon fuel line.. typically terminated at each end with a compression ferrule type fitting.. really easy to just get new line, new ferrules and run continuous lengths of it... it can be spliced with proper compression fittings, however this line is suceptible to becoming brittle over the years so when you go to cut the bad section out you are likely to create micro cracks which will turn into new leaks..


change the whole section of it..
if you pull it off and take it to a NAPA store that sells Heavy duty parts they likely will have the line and ferrules right on the shelf and you make your own lengths of it where you can route it away from hazards..
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