fuel Filter Replace
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Laughing Gas
Joined: Aug 2003
Posts: 836
Likes: 9
fuel Filter Replace
Usually I am lazy and I pay to have the fuel filter changed but deicided I am getting too cheap to pay the price.
I have watched a couple of yoiutube video's one showering draining the fuel bowl. I understand that using the drain can make the valve leak? I watched another video where the guy did not drain teh fule bowl he just unscrewed the cap and pulled out the filter? Also is it necessary to depressurize the fuel system before removing the cap? do you have to drain the fuel filter before changing?
I have watched a couple of yoiutube video's one showering draining the fuel bowl. I understand that using the drain can make the valve leak? I watched another video where the guy did not drain teh fule bowl he just unscrewed the cap and pulled out the filter? Also is it necessary to depressurize the fuel system before removing the cap? do you have to drain the fuel filter before changing?
Elder User
Joined: Apr 2008
Posts: 511
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Check this out from a couple weeks ago: https://www.ford-trucks.com/forums/1...le-filter.html
The answer to your questions are yes, yes, and no. An old, rarely used valve will most likely not work, and once you rock the valve open and then closed it will probably start leaking. I found out the hard way.
Yes you can just crack the lid...but surround it with towels and go slow. There is no depressurizing step that I know of, other than cracking the lid and waiting for the seepage to stop.
The answer to your questions are yes, yes, and no. An old, rarely used valve will most likely not work, and once you rock the valve open and then closed it will probably start leaking. I found out the hard way.
Yes you can just crack the lid...but surround it with towels and go slow. There is no depressurizing step that I know of, other than cracking the lid and waiting for the seepage to stop.
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Laughing Gas
Joined: Aug 2003
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Likes: 9
As I was gathering information I was pretty sure that I had to use the drain valve and when I watched the video and he did not it kinda threw me a curve. I did not remember your very informative explanation in the first thread. Thanks for that..
I have my fuel filter changed every 15k. So, assuming they used the drain valve it should be working.
I think I will try changing it without using the drain valve. For all I know they may never have used it either..
I have my fuel filter changed every 15k. So, assuming they used the drain valve it should be working.
I think I will try changing it without using the drain valve. For all I know they may never have used it either..
Elder User
Joined: Apr 2008
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I wouldn't assume anything. There is a YouTube video out there done by a Ford Tech at a Dealer....he specifically stated they never use the drain valve on these trucks, they just slowly crack the lids as the valves are known to fail thanks to original o-rings.
Its an easy enough fix however if you want to try it. About $30 in parts for the valve and o-rings and about an hours work. Hardest part is figuring out how to perch yourself up that high.
Its an easy enough fix however if you want to try it. About $30 in parts for the valve and o-rings and about an hours work. Hardest part is figuring out how to perch yourself up that high.
Senior User
Joined: Jun 2015
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I just changed mine and the valve did not work. I left the diesel in the housing and just lowered the new dry filter in slowly. The dry filter soaked up the diesel as I lowered it. Very little diesel spilled out, I only had to use one rag. One good thing about not draining and lowering the new filter slowly, you will not get much air in the system. Just cycle the key 3 times, again slowly. Turn the key and you will hear the pump when it stops, repeat, repeat and start. Check for leaks, test drive and re-check for leaks.
Elder User
Joined: Apr 2008
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Gatordog....keep an eye under your truck now for small signs of a diesel leak. I did the same thing you did - cracked open the valve and it didn't work. Closed it off and cracked the lit to replaced the filter as you described. The next day I noticed diesel stains under the truck. The valve started leaking and dripping from the tube after I rocked it open and closed....so I had to replace the drain valve.
FTE-Spread The Knowledge
Joined: Feb 2008
Posts: 2,287
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If your fuel bowl valve doesn't work you can get a hand primer siphon pump for $3 at Auto Zone and pump a couple of times and the siphon will start and you can drain the fuel bowl out completely. I have had to do this on several trucks. Works great for getting any water out of the bowl!
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Senior User
Joined: Jun 2015
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Thanks for the heads up Jason, I just bought the truck and I have a plywood board under it to see what might be leaking. So far not a drop. What is a 6637 filter?
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Go Bills !
Joined: Jan 2008
Posts: 2,778
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From: Buffalo, NY
I only had a problem with one trucks valve. Leaked. I bought bag of orings for pennies, And when I changed the fuel filters, I went ahead and changed the orings on all the valves. That was a few years ago. Still have the bags of orings. Changed a fuel filter on a truck last Saturday, Valve worked fine. Got two more to do this week,You can change those orings in 15 minutes . I have never had to replace orings that I have already changed previously.
http://www.riffraffdiesel.com/viton-...ve-orings-set/
http://www.riffraffdiesel.com/viton-...ve-orings-set/
Cargo Master
Joined: Jul 2011
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From: Walpole, MA
Here is what they look like installed.
Senior User
Joined: Oct 2015
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Usually I am lazy and I pay to have the fuel filter changed but deicided I am getting too cheap to pay the price.
I have watched a couple of yoiutube video's one showering draining the fuel bowl. I understand that using the drain can make the valve leak? I watched another video where the guy did not drain teh fule bowl he just unscrewed the cap and pulled out the filter? Also is it necessary to depressurize the fuel system before removing the cap? do you have to drain the fuel filter before changing?
I have watched a couple of yoiutube video's one showering draining the fuel bowl. I understand that using the drain can make the valve leak? I watched another video where the guy did not drain teh fule bowl he just unscrewed the cap and pulled out the filter? Also is it necessary to depressurize the fuel system before removing the cap? do you have to drain the fuel filter before changing?
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