1989 5.8 fuel pressure question

[goodO1boydws]

I had imagined that it would just drain a little from the line but it was a lot of gas that drained already and it was still flowing.

If there is an open path through the in-tank pump, when the LEVEL where the line is open is below the level where the fuel in the tank is being picked up, the fuel coming through would be subject to a siphoning action. In such a situation, this would act to PULL fuel from the tank instead of only draining a small amount of fuel from that portion of the line higher than where it is opened (which would be due to gravity alone).

 

[mikefamig]

If that is the cartridge filter for the reservoir, it will come with o-rings, including that elusive, large bowl seal.



Ooh, see there? Even old dogs can learn new tricks!

Just last week I did a roadside inline fuel pump diagnosis and replacement on the side of a local mountain road for a real special customer's '88 dual-tank 4.9L E150. Took my 1/2" drive strap wrench and a Wix filter kit, but couldn't budge it. Luckily it ran strong with new pump, and I rescheduled her for service next month when I figured I'd wrench it off with my big Knipex water pump plyers.

View attachment 30415

So what grade sandpaper should I use?

I had a scrap of fairly coarse paper, probably a 100 grit or so.

That is some man-size pliers you go there!

 

[mikefamig]

OK I managed to remove the bowl from the reservoir with it still attached to the frame rail. My strap wrench was slipping but a piece of sandpaper wrapped around the filter bowl gave it some grip.

There was no filter in there and the seal is shot so I'm waiting for one from NAPA. I ordered a couple of o-ring part# 5347 for a couple of bucks which will not get here until late next week and I also ordered a filter NAPA #3268 which should be in my local store tomorrow.

If the seal from the filter does not fit then I will still have the other seals coming, otherwise I can cancel them.

Thanks all for the info that got me there painlessly. I'll update when I install the seal.

Today I got the filter and seal. The seal diameter was a little small to fit into the groove on the reservoir cover and at first I had no idea how I could assemble, it just didn't stay in the little groove in the cover. There was just no way that I could get it to stay in that little groove without it popping out of place.

I ended up stretching the seal over the outside diameter of the cover and heating it with a heat gun making it stretch just a little. then I used some silicone grease to hold it in place and it stayed in place pretty good. I figured that I would have to assemble it more than once before I got it together with the seal seated properly but it sealed on the first shot. I'm not calling it fixed until it stays dry for a week or so and then I'll be comfortable that it is a permanent fix.

Mike.

 

[Jimbo26]

If you can get those plenum side injectors out w/o removing the plenum, add 'Houdini' to your title.

 

[goodO1boydws]

If this was on mine, I'd wait to see if those other seals you ordered are any better fit, and if so swap one of those in.

That seal being too small in diameter to fit the groove properly sounds as though it might be very old, or just made of inferior material, either one of which could have dried out and shrank.
IF that's the case, it may have outgassed enough of any plasticizier that is supposed to keep it from being stiff and brittle, and soon do the same thing that the previous one did.

 

[mikefamig]

If this was on mine, I'd wait to see if those other seals you ordered are any better fit, and if so swap one of those in.

That seal being too small in diameter to fit the groove properly sounds as though it might be very old, or just made of inferior material, either one of which could have dried out and shrank.
IF that's the case, it may have outgassed enough of any plasticizier that is supposed to keep it from being stiff and brittle, and soon do the same thing that the previous one did.

I agree and I'm not completely comfortable with the fact that that seal is in place as it should be but it is not leaking and I'll be leaving it alone unless it does leak. If I got lucky enough that the seal stayed in the groove when I screwed the bowl on then it is as good as new. If it moved out of place then it may begin to seep again but I'm willing to wait and see.

I'm working laying on my back on the floor and not having a lot of fun under there. At 68 years old it is a lot more painful working underneath and leaning over the top of fenders than it used to be. Sometimes I wonder why I'm still doing this to myself because it is a hobby and for my "pleasure". I don't know if I have any choice, I've been turning wrenches since I got my first mini-bike when I was 11 years old and it's in my blood.

Mike.

EDIT

Also the Bronco was tying up a garage bay and it was worth putting it together just to make it mobile again.

 

[mikefamig]

If that is the cartridge filter for the reservoir, it will come with o-rings, including that elusive, large bowl seal.



Ooh, see there? Even old dogs can learn new tricks!

Just last week I did a roadside inline fuel pump diagnosis and replacement on the side of a local mountain road for a real special customer's '88 dual-tank 4.9L E150. Took my 1/2" drive strap wrench and a Wix filter kit, but couldn't budge it. Luckily it ran strong with new pump, and I rescheduled her for service next month when I figured I'd wrench it off with my big Knipex water pump plyers.

View attachment 30415

So what grade sandpaper should I use?

I was using a rubber band type strap wrench, not a metal oil filter wrench.

Mike.

 

[L\Bronco]

I agree and I'm not completely comfortable with the fact that that seal is in place as it should be but it is not leaking and I'll be leaving it alone unless it does leak. If I got lucky enough that the seal stayed in the groove when I screwed the bowl on then it is as good as new. If it moved out of place then it may begin to seep again but I'm willing to wait and see.

I'm working laying on my back on the floor and not having a lot of fun under there. At 68 years old it is a lot more painful working underneath and leaning over the top of fenders than it used to be. Sometimes I wonder why I'm still doing this to myself because it is a hobby and for my "pleasure". I don't know if I have any choice, I've been turning wrenches since I got my first mini-bike when I was 11 years old and it's in my blood.

Mike.

EDIT

Also the Bronco was tying up a garage bay and it was worth putting it together just to make it mobile again.

we had to do a fuel line recall on the F series at the dealership in the 90's that involved removing the standpipe in that reservoir and installing the cartridge filter. That "O" ring was always a tight fit. (if you got it in, they were fine!)
Cheers

 

[Motech]

Agreed on tight fit. Than NAPA Gold is an excellent product: rebranded Wix. I used to gob it in there with a bunch of Vaseline.

 

[Motech]

I was using a rubber band type strap wrench, not a metal oil filter wrench.

Mike.

Mine's a canvas band type.

 

[goodO1boydws]

At 68 years old it is a lot more painful working underneath and leaning over the top of fenders than it used to be. Sometimes I wonder why I'm still doing this to myself because it is a hobby and for my "pleasure".................................................Also the Bronco was tying up a garage bay and it was worth putting it together just to make it mobile again.

I hear you-and add 2 to your count.
(I used to work on my/our cars for fun-now its almost always out of necessity.)

This Summer I had to tow my (again) non-starting B2 out of the garage and jockey it around a tight curve, up and down a gravel driveway a few feet at a time, while seesawing it sideways using a one-wheel-drive sedan, just to move it far enough out of the way to be able to get our OTHER vehicles-with-issues around it into the only open garage space available. Seemed as though I'd gotten in and out of the vehicles 50 times to crank the steering, set the brakes, shift gears, reposition the chocks, and rearrange the chain and it ended up being less than 50 feet from where I'd started. (So I could still be able to get power and tools to it easily.)