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Old 03-11-2018, 10:49 AM   #61
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Default Re: Water in Fuel Light WIF warning is on.

While on this subject a wire on the WIF sensor has broken on my 2002 313 sprinter. Just changed the filter and noticed it, dont know whether it was already broken or if i broke it today. Will this affect the running of the engine
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Old 03-11-2018, 09:10 PM   #62
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Default Re: Water in Fuel Light WIF warning is on.

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... Will this affect the running of the engine
No. Assuming that it is the WIF sensor wire.

A broken or open wire on a WIF sensor may cause erroneous dash warnings during wet weather. The sensing circuit doesn't know if the water is inside or outside the filter.

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Old 08-05-2018, 07:19 PM   #63
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Default Re: Water in Fuel Light WIF warning is on.

You can drop a silica gel sachet on a string into a tank to absorb water, they will absorb water and leave fuel.
How to get it in the tank is up to you, perhaps added to an inline prefilter?
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Old 08-06-2018, 01:17 AM   #64
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Default Re: Water in Fuel Light WIF warning is on.

Silica can only absorb up to 35% of its weight in water (usually less). So a heavily contaminated tank will need quite a bit of desiccant. Better to use a 4 micron filter with silicone water coalescing coating. For vans with an electric lift pump donaldson makes some great filters like this (I have two in series with my engine filter).
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Old 08-06-2018, 02:24 PM   #65
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Default Re: Water in Fuel Light WIF warning is on.

A recent reminder that, although not an extensive problem, WIF is nothing to be taken lightly.

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Originally Posted by PeterInSa View Post
A friend has a Vito, down on diesel, fills up at a local garage, 100m down the road his vehicle starts to splutter. Has it trayed to his mechanic and $4500 later paid for by his insurance company he is back on the road.

Saw the mixture in a soft drink bottle looked like a lemon drink.

I would have thought his MB Vito would have a water sensor/light.

Our Sprinter has the water sensor stuff under the Fuel filter I wonder if that/light/me, will save the engine, if I get a load of water in the diesel, rather than just a small bit of water over time.

Incidentally the Sprinter Insurance covers dirty Fuel, unlike the RAA with no cover for our Landcruiser ( not that I have ever needed it, but they have accidental damage that does not cover dirty fuel).

Peter
My opinion is that we likely do get small amounts of WIF from condensation and slightly off grade fuel, but over time introducing good fresh fuel can help to get rid of those small amounts. The problem is when too much free water is in the fuel tank and it gets pulled into the injection system.

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Quote:
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...

My understanding is that the problems with water in fuel are not so much related to the affects on combustion as they are on the fuel system itself. Particularly the latter end of the fuel system - the injectors and high pressure pump.

These have very tight tolerances and depend on the fuel itself for lubrication. Water, or a water and fuel emulsification, make lousy lubricants. So get too much water (whatever that "too much" is according to the engineers), and you have fuel system problems and failures.
That's my understanding too. In extreme cases water in fuel can even crack injector bodies and nozzles.

That's my discussion here. Water doesn't seem to automatically build up in our tanks. Are we all always getting perfectly dry top quality fuel? That seems pretty doubtful. ALL diesel fuel can carry a bit of water. Some types (biodiesel/blends) can carry more. Temperature affects the water capability. I would expect that the heat/cool cycles that most tanks see would tend to precipitate out the water at one time or other.

The fuel in our Sprinters is heated and circulated back to the tank. The heated fuel will hold more water than cold fuel. Assuming that the fuel we pump into our tank is not very "wet", does that heat and circulation process help to keep the free water from accumulating in our tanks by taking the moisture away in very small doses?

The OEM filter membrane is designed to trap free water. As I mentioned earlier, it must not be trapping the "in range" amount of water in the fuel or else we would all be regularly draining our WIF filter system. Originally "dry" at lower temperature biodiesel when heated may be more efficient at water control than is heated dino diesel.

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Granted, sufficient amounts of water in the combustion chamber can cause problems, too.
It would seem to me that the amount of water would need to be pretty high for that to become a real concern. Our WIF monitor should be warning us before that is a problem. I have no data.

vic
Clicking the blue arrow icon within any quote box will take you to the original thread.

Doing that above takes you to more discussion here.

Bio Fuel and Water
https://sprinter-source.com/forum/sh...ad.php?t=56421

Keep Your Fuel Receipts!
Some great advice by Poddydodger.
I always pay by card and keep my receipts for a time. I hadn't thought to add the odometer reading on the receipt.

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Originally Posted by poddydodger View Post
My diesel mechanic advised me to always pay by card, always buy the same brand eg Caltex, BP and always write kms on receipt, this way you have come-back for dirty diesel.
Rob.

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Old 11-16-2018, 02:07 PM   #66
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Default Re: Water in Fuel Light WIF warning is on.

Interesting thread. I own a 2016 Itasca Navion. I read a post saying to buy a Mahle fuel filter.
I have still not found the correct Mahle fuel filter but did see this Mahle article about their fuel-prefilters.

https://www.mahle.com/en/news-and-pr...-the-world-390
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Old 11-16-2018, 03:00 PM   #67
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Default Re: Water in Fuel Light WIF warning is on.

Quote:
Originally Posted by Laurent View Post
Interesting thread. I own a 2016 Itasca Navion. I read a post saying to buy a Mahle fuel filter.
I have still not found the correct Mahle fuel filter but did see this Mahle article about their fuel-prefilters.

https://www.mahle.com/en/news-and-pr...-the-world-390
Interesting article. Thanks.

I have read other places that fuel flow and volume inconsistencies create design issues for water separation.

As long as this thread is revived...
Water in fuel doesn't seem to be a great problem here in the USA and, I assume, Canada. I purchased a MAHLE KL 313 filter for my 2006. I have yet to install it.

My advice hasn't changed as to response to a WIF dash warning. The consequences of ignoring water in fuel can be expensive.

It is not a good idea to ignore the WIF warning and just press on.

If the warning isn't caused by some sensor or harness failure and you do have water in your fuel, additives will likely not correct the problem and can increase the extent of damages.

Don't obsess about the possibility of water in diesel fuel. Properly react to a WIF dash warning if it happens.

vic
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Old 11-16-2018, 05:09 PM   #68
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Default Re: Water in Fuel Light WIF warning is on.

My :2cents and important detail: the photo is of a 2015 OM 651 fuel filter drain line. I have not extended the drain line so fuel/water will be directed overboard and NOT in engine compartment, but plan to do so.

Splashed/spilled diesel fuel inside the engine compartment is MOOP (Matter Out Of Place) and can contribute to FOD (Foreign Object Damage). A clean engine compartment is a happy place. Especially while performing maintenance or repairs.
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Last edited by Bobnoxious; 11-16-2018 at 05:21 PM.
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Old 11-17-2018, 02:52 PM   #69
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Default Re: Water in Fuel Light WIF warning is on.

Pretty sure you can move that line so it drains into a suitable container when bleeding water from the fuel filter.

(so no need to extend the hose... you really want to catch and properly dispose of the water-contaminated fuel you will remove from the hose.)
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Old 11-18-2018, 08:24 PM   #70
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Default Re: Water in Fuel Light WIF warning is on.

IDK, line is short, won't take much effort or expense to add an extention.
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