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Unread 11-22-2008, 01:45 PM   #1
Rproject
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Fuel filter replacement - How do I depressurize fuel system?

In looking at the Chilton's manual it says to relieve the pressure in the fuel system prior to replacing the fuel filter. Specifically it says, "Release the fuel system pressure. Refer to the procedure outline earlier in this section." Only problem is, there is no procedure outline earlier in the section. ?????

So, how do I relieve the pressure?

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Unread 11-22-2008, 02:15 PM   #2
CheapSunglasses
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I'm not sure, but maybe if you crack open the gas cap.
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Unread 11-22-2008, 02:17 PM   #3
bcwheeler
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Their should be a Schrader type valve on your fuel rail that you can push on. Sprays gas out of it so hold a rag or something over it. Plus unscrew your gascap on the other end.
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Unread 11-22-2008, 02:18 PM   #4
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I'm not sure if it's correct or not, not I just loosen the fittings on the filter. A little gas leaks out, it depressurizes and I then change the filter. It works for me
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Unread 11-22-2008, 02:50 PM   #5
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BCWheeler's right. On the drivers side of the top of the engine, there's a valve with a black cap sitting right on the top of the frame rail. Remove the cap, rag over top, and press the valve (looks like a tire valve stem) with a flathead screwdriver. A little gas should shoot out.
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Unread 11-22-2008, 03:15 PM   #6
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I do it the same way.
Quote:
Originally Posted by chadroc View Post
I'm not sure if it's correct or not, not I just loosen the fittings on the filter. A little gas leaks out, it depressurizes and I then change the filter. It works for me
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Unread 11-22-2008, 03:34 PM   #7
YJames90
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I just removed the filter. A little gas dripped out. I kept the rubber hose pointing up so no gas came out
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Unread 11-22-2008, 03:54 PM   #8
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At this point I'm thoroughly convinced that what I am attempting to change is the ORIGINAL fuel filter with 159K miles on it. The shroud bolts are so frickin' rusted I can't believe that they're ever been out before. I've got 2 down and 2 to go. What an absolute PITA. It shouldn't be this hard.
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Unread 11-22-2008, 03:58 PM   #9
swedishdwarf
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The easiest and cleanest way to depressurize the fuel system is to start it up and pull the fuel pump fuse. When it stalls, your fuel pressure is gone.
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Unread 11-22-2008, 04:30 PM   #10
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That's great, but I still have 2 bolts to remove before I can even GET to the flippin' filter. 3.5 hours and only have 2 bolts out. At this rate I'll have the fuel filter replaced sometime around the New Year.

Of course the 2 that are out are the "easy" 2. The two that face mount to the frame rail are being absolutely insane. Both are so rusted that they don't even look like bolts anymore, but of course they have enough bite and enough metal under all the dang rust that I can't just break 'em off.

Napalm, that's what I need, napalm.
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Unread 11-22-2008, 06:59 PM   #11
bcwheeler
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Yea torch it off, Its not like gas is flammable...
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Unread 11-22-2008, 10:15 PM   #12
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FINALLY got the project done. Had to dremel off 2 of the bolts. Slotting them didn't work, had to completely cut off the heads. Overall project time? 8.5 hours. What a nightmare.

Now with the project done, the next question comes; How important is this shroud? I can get 2 of the bolts back in relatively easily, the other 2 forget about it. They're toast and so are the holes.

I guess if it's important enough, I can always put it back on with 2 screws, then zip tie it to keep it from coming loose.

Thoughts?
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Unread 11-23-2008, 09:08 AM   #13
YJames90
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I left the shroud off. Not thats its the correct way to do it but mine was a mess
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Unread 11-23-2008, 09:34 AM   #14
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i put it back on biut thays just me but it could realy ruin a day if it took some damage
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