Fuel filter change - drain question
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Freshman User
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Fuel filter change - drain question
I bought a 2005 6.0 and today I changed oil and fuel filters for the first time. Top fuel filter was of course a breeze. Bottom one I followed the instructions to remove the drain plug and it was quite messy as expected. The fuel eventually drained at a slower pace and I let it drain for about 25mins. I didn't see it slowing and at that point it was just fuel. I put the plug back in and removed the filter cap. More fuel came out and it too eventually slowed to a consistent drain with no sign of stopping. I let it drain for about 20 mins. The instructions that came with the motorcraft fuel filters said to drain completely but it seemed like it was just siphoning from the tank..idk...is this normal or do i have an issue in my fuel system?
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Freshman User
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I filled up yesterday so the tank is completely full. Sounds normal then?
Fleet Mechanic
Joined: May 2010
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From: West by God Virginyuh
In addition to waiting until less than 1/4 tank park with front of the truck slightly uphill if possible. Parking slightly uphill I've been able to change with over 1/2 tank without issue.
Hotshot
Joined: Jul 2005
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From: Middle Tn.
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Logistics Pro
Joined: Feb 2013
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From: TX
Fuel filter change - drain question
I've had it both ways.......constant drain and just a little. For me it is dependent on the angle I'm parked.
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Fleet Mechanic
Joined: May 2010
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From: West by God Virginyuh
On my 6.4 even with the front slightly uphill it would drain forever with a full tank. I stopped after 1/2 gallon and just waited for the fuel level to go down. Fortunately with that trucks horrible mileage it only took a couple days 
With the 6.0 I haven't tried on a full tank, but I always park slightly uphill
With the 6.0 I haven't tried on a full tank, but I always park slightly uphill
Lead Driver
Joined: Jul 2004
Posts: 6,950
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From: Foothills, CA
On my 6.4 even with the front slightly uphill it would drain forever with a full tank. I stopped after 1/2 gallon and just waited for the fuel level to go down. Fortunately with that trucks horrible mileage it only took a couple days
With the 6.0 I haven't tried on a full tank, but I always park slightly uphill
With the 6.0 I haven't tried on a full tank, but I always park slightly uphill
Sorry, but that is actually sort'a funny...I get more out on a fuller tank too, so I wait 'til about a quarter tank and can do it on the flat. On a 4x4 it is especially challenging (unless you are Jack and have relocated your HFCM
). One thing you should get is the updated drain plug. Last time I stuffed a sheet of aluminum foil up under the HFCM, then another over the front driveshaft, and fashioned both to a V shape down into my drain pan. I found if you take the drain loose slowly and leave it at more of a trickle it is way better than full-flow, bouncing off the driveshaft, splashing everywhere, back on the frame rail, running down your arms, dripping on your crotch 
(don't light a match)... 
Well you get the idea: slower is better and the new drain will be even better yet...
New User
Joined: Jul 2020
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Fuel fix
I bought a 2005 6.0 and today I changed oil and fuel filters for the first time. Top fuel filter was of course a breeze. Bottom one I followed the instructions to remove the drain plug and it was quite messy as expected. The fuel eventually drained at a slower pace and I let it drain for about 25mins. I didn't see it slowing and at that point it was just fuel. I put the plug back in and removed the filter cap. More fuel came out and it too eventually slowed to a consistent drain with no sign of stopping. I let it drain for about 20 mins. The instructions that came with the motorcraft fuel filters said to drain completely but it seemed like it was just siphoning from the tank..idk...is this normal or do i have an issue in my fuel system?
Mountain Pass
Joined: Feb 2016
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Ha, pretty old thread.
Fleet Owner
Joined: Apr 2012
Posts: 27,307
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From: Spanaway
I have two of the same 2006 CCLB trucks and one will dribble if I don't wait for a 1/4 tank to change the filters.
The other one I can fill the tank and turn around and change the filter with no issues. Don't know if this has any effects
or not. I do the lower filter first and they I move onto the upper filter.
The other one I can fill the tank and turn around and change the filter with no issues. Don't know if this has any effects
or not. I do the lower filter first and they I move onto the upper filter.
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