DFCM Draining
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Freshman User
Joined: Jan 2006
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From: Wisconsin
DFCM Draining
I know there is already a post about this, but after 7 pages and not finding the answer I was looking for I decided to make a new post. Ok, so I used to have a 7.3 and when I opened the petcock to drain the water out, the flow of fuel/water would only last so long. When I drain the 6.7 it seems it just keeps pouring out. So dumb question here, how do you change the filter with that much fuel coming out, or is mine just the exception? Thanks ahead of time..
Lead Driver
Joined: Nov 2005
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But, yes, three turns of the lower housing using a 1-1/4" six point socket to loosen it initially. And don't forget to unplug the sensor before starting, and plugging it back in after you're done.
There are a number of videos on youtube showing the whole procedure.
Lead Driver
Joined: Jan 2010
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When changing the filters, if you don't turn the lower bowl over three turns the DFCM will continue to siphon the tank as the others mentioned.
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5th Wheeling
Joined: May 2014
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Thanks for that. I assumed this was procedure for changing fuel filters only but not regular water drain.
On that note, the fuel filter change looks so easy but with lots I have read regarding warranty, fuel systems, etc. I have let the dealer do all regular maintenance.
Last week had oil change, fuel filters, rotate tires, top up def, and asked about air filter but they did not deem it needed change.
$ 420 bucks CDN and I thought it would be worse!!!!!
only 25000 on my 2012 f350 lariat
love the beast
How often are you guys changing air filters? Sorry for hijack.
On that note, the fuel filter change looks so easy but with lots I have read regarding warranty, fuel systems, etc. I have let the dealer do all regular maintenance.
Last week had oil change, fuel filters, rotate tires, top up def, and asked about air filter but they did not deem it needed change.
$ 420 bucks CDN and I thought it would be worse!!!!!
only 25000 on my 2012 f350 lariat
love the beast
How often are you guys changing air filters? Sorry for hijack.
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Lead Driver
Joined: Nov 2005
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No need to drain a liter of fuel to let the water out if there is any in it. Water is heavier than fuel so it is always at the bottom and will drain out first so you don't need to drain much to get the water out. And you can let it go until it turns the "Water In Fuel" light on, then drain it.
As to the air filter, they can go a very long time, change it when the restriction monitor shows a restriction.
Now, if you're **** retentive, then never mind the above and replace the air filter every other oil change and drain the DFCM weekly...
As to the air filter, they can go a very long time, change it when the restriction monitor shows a restriction.
Now, if you're **** retentive, then never mind the above and replace the air filter every other oil change and drain the DFCM weekly...
FTE Chapter Leader
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From: North Central Washington
The WIF sensor? Why do you have to do that?
Lead Driver
Joined: Jan 2010
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Drain it monthly or at least some period of time. My opinion, waiting for the light is asking for expensive trouble.
BTW, drain after you have turned the bowl past three times then it is mess free when removing the bowl...forgot to mention that.
BTW, drain after you have turned the bowl past three times then it is mess free when removing the bowl...forgot to mention that.
Lead Driver
Joined: Nov 2005
Posts: 8,465
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As to waiting for the sensor, that's what it's there for.
But, each to his own.