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Old 05-09-2021, 10:42 PM   #1
Join Date: Jul 2019
Posts: 34
6.0 PSD Heater Hose Design Question

For a cargo van with no rear heat,
can anyone tell me why this hose is a loop with a metal section?

I'm rebuilding my coolant system, and I'm adding some things in, like future provisions for a hydronic heater, and a coolant filter, and the max ac valve.

However, for the life of me, I cant figure out why this hose is this way. For context, I took a blown up motor out of the van a year ago, and now I'm trying to get it back together.

And here is a link to the assembly diagram.

So the question is, can this be simplified? Why is there such a large loop? Why the metal section.

For those wondering, here is the parts page for the rear heat version.
Thanks all!

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Old 05-10-2021, 05:35 AM   #2
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Join Date: Jan 2009
Location: Corvallis, OR
Posts: 5,013
I'd guess it's so engine vibration doesn't damage the heater Core. The metal section probably so it doesn't sag and rub on something. I think you could make your own all-hose loop, as long as it's supported with a zip tie or something, and protection against abrasion wherever it's touching another component. The gassers just get a straight hose here but they wouldn't have added this loop if they didn't see issues.

2000 E450 dually V10 wagon
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Old 05-10-2021, 09:39 AM   #3
Join Date: Jul 2019
Posts: 34
I wonder if it because they wanted to use the hard line that comes off the front cover that this is looped the way it is. That hard line bolts to the alternator bracket, almost a tad too far back.
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