Diesel fuel line water filter/trap draining - Ford Transit USA Forum
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post #1 of 9 (permalink) Old 10-18-2016, 02:35:AM Thread Starter
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Diesel fuel line water filter/trap draining

How often have you diesel guys needed to drain the fuel line water filter?

According to the manual there's supposed to be a warning pop up on the dash telling you when to drain it.

I'm wondering if it's better to just drain it at each oil change or ??? so you're not stuck having to crawl under the van and drain it at a less opportune time.

Please post your experience with this.

2016 T250 148" MR Cargo 3.2L 3.73 LS all around windows
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post #2 of 9 (permalink) Old 10-18-2016, 06:50:AM
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ford f-350 airport shuttle buses about once a year, water if fuel is mostly a a cool/cold weather thing, cool weather causes moisture in fuel to condensate on the sides of the fuel tank. keep your fuel tank full as often as possible keep condensation in check. also water in fuel causes black algae to grow in your fuel tank which can lead to endless fuel filter changes, so the fuel tank should be treated with an algaecide once a year in high yearly mileage driven vehicles.
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post #3 of 9 (permalink) Old 10-18-2016, 07:14:AM
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I've spot checked mine a couple of times, never gotten any water out- I'm at 16,000 miles.
My F350 diesel has 213,000 miles and its the same, check it occasionally and probably haven't gotten a total of a teaspoon out in all those miles and 20 years.

What bothers me is the biodiesel situation- it is known to harbor water- almost all the diesel stations in SC have a sticker on the pump stating between 5-20% bio. Above 5% is not acceptable in my 20 yr old pickup.

I did find one station without the label, the local Sam's Club. I contacted their headquarters and they confirmed they do not have bio in their diesel. It is violation of federal law to not label if there is bio in the fuel.

So- guess where I fill up whenever possible?

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post #4 of 9 (permalink) Old 10-18-2016, 01:02:PM Thread Starter
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Thanks for the feedback & education guys.

Being that SoCal hardly ever gets cold (never by some standards) it's probably a non-issue for me.

I haven't seen much BioDiesel in California which surprises the heck out of me. I first encountered it last weekend it at a Flying J truck stop in Arizona. The funky thing is, the pump label only stated "may contain 5-20% bio..." but they didn't state exactly how much which could be a issue for some as pointed out by Budsky. On the return trip I chose a different station. It looks like the Ford manual says up to 20% is acceptable.

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post #5 of 9 (permalink) Old 10-18-2016, 01:45:PM
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Ford also says to not store biodiesel in the Transit fuel tank for longer than one month.
That is an issue for me- for instance we were gone over 30 days in a row earlier in the year and the Transit was parked.
My pickup may sit with the same fuel in it for several months at a time...
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post #6 of 9 (permalink) Old 10-22-2016, 10:34:PM
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Drain it on every oil change. You may get nothing but then again you might get a lot. My F350 would be dry most of the time but every once in a while it would dump quite a bit. One thing that's for sure, draining regularly is one heck of a lot easier than changing that filter even if you have the special tool.
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post #7 of 9 (permalink) Old 12-10-2016, 05:59:PM
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Where is the fuel filter water trap located?
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post #8 of 9 (permalink) Old 12-17-2016, 10:02:PM
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Underneath, drivers side just ahead of the rear axle.
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post #9 of 9 (permalink) Old 02-06-2017, 01:57:AM Thread Starter
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I finally drained my water trap this weekend (~15k miles) and very little water came out, maybe a 1/4 teaspoon before it ran pure diesel.

But I live in SoCal where it's pretty dry most of the time and doesn't get real cold. I'm guessing I can easily go about 10k miles between drains but will probably do it every oil change (currently every 5k miles).

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