Installing fuel line for heater (diesel)

[schluchtenflitzer]

Originally Posted by E350

BTW, two years later my tank delaminated and ruined my injectors.

E350 i do not understand why you ruined your injectors because of this. There are severel filters before it. Do they not help?
I have installed an aftermarked 46 gal tank so i will not have the delaminate problem but maybe it will get rusty inside. And than?

[E350]

This is my understanding and observation:

1. Diesel fuel lubricates and cools the injectors (higher the sulpher content the better) add a fuel restriction in the single filter in the engine valley between the valve covers (there is also one screen in the pickup foot and two cylindrical screens above it) and the injector plungers then overheat and score their cylinders; and

2. I actually examined the seven microscopic holes in my injectors under a stereoscope. Some were plugged with the silver paint particles which made it past the single fuel filter to the injectors.

Take a look at my photos in the previous post and you will see the paint debris and the condition of my filter.

My injectors had 160,000 miles on them at the time of the event.

[schluchtenflitzer]

Ok now i get it.
i am still wondering how/why the paint could pass the main fuel filter. It is his job to filter such things out....bad boy
Now i am thinking to built in an second filter system befor the pump.... something like this

[E350]

Don't do it. Your fine filtration will create a fuel restriction itself, and will reduce the fuel pressure to your injectors.

See:

http://www.ford-trucks.com/forums/12028 ... ainer.html

Replace the intank screens with a frame rail mounted Racor PS120-02 screen not a filter.



Tugly did what you are suggesting and eventually did what I did because he watched his fuel pressure drop after adding the type of overly restrictive filtration you are suggesting.

See:

http://www.ford-trucks.com/forums/12798 ... tions.html

[Crobins937]

I'm having the same issue as telehead.
I have searched for something like the tee's that schluchtenflitzer has posted, no luck. Bones_GSXR, what tee did you use and where did you get it, mine is gas too? I really like the tee that runs with the filler line, but a tee in the sending unit is still a great option.

Thanks for the help.

[schluchtenflitzer]

E350 Thanks for this information.
I will think about what prefilter i will use. Recor is not available here in germany.
What way does the diesel take? I do not understand some things.....
What i imagine for the 7.3

Tank>screen in the tank>pump>main filter at the engine> high pressure pump> screens in the zylinder head>injektors

My questions

-is that right?
-how many screens are complete in the van?
-what funktion do they have in the zylinderhead and why the can plug with dirt since there is the main filter -whitch is much small meshed- before them?

i am confused....

[schluchtenflitzer]

Originally Posted by Crobins937

I really like the tee that runs with the filler line, but a tee in the sending unit is still a great option.

Thanks for the help.

here you can buy. I think he will also send it to US.
If they do not i can help you

http://www.ebay.de/itm/Webasto-Tankentn ... 2ec7080de1

[E350]

Canyon Sportster: Although there is much discussion of a fuel pump inlet screen, no one has posted a picture of it. So I am doubtful that it exists.* The injectors don't have screens.

So that leaves only the screens in the tank (which should be removed during the Hutch Mod) and the original equipment manufacturer's (OEM) fuel/water separator filter in the valley between the valve covers.

Yes, there is a high pressure pump (the HPOP), and it does have a small screen, but it does not pressure fuel, rather it pressurizes oil. The 7.3L is not a common fuel rail system. The 7.3L is a HEUI system ("Hydraulically Actuated Electronically Controlled Unit Injector") in which each injector is responsible for pressurizing and atomizing the fuel for its cylinder only. Each injector does this by a plunger much like in a medical syringe. The high pressure pump (HPOP) merely pressurizes the oil which, when the armature on the injector is electrically activated, opens a valve to let the oil rush in to push the plunger down to shoot the fuel out the seven very very very small nozzle holes, thus atomizing the fuel to be burned, into the cylinder.

I can't find the cutaway of the injector itself, but here is a cutaway of an injector in its cylinder showing the electric actuator/solenoid on top, the fuel and oil galleys in the cylinder head, and the injector's dedicated glowplug to the right:



For my van, I frequent this Sportsmobileforum.com and the 7.3L subforum at ford-trucks.com

Your English is very good and the members of the 7.3L forum are great, so, since I don't know one tenth of what they know, I strongly suggest that you join the ford-trucks.com forum for free and post your question as written.

The Brotherhood will then answer your question and it will help you, me and many others understand our engines better.

1999 - 2003 7.3L Power Stroke Diesel

http://www.ford-trucks.com/forums/forum31/


* Edit: There really is a pump inlet screen!

http://www.ford-trucks.com/forums/12785 ... st13766613

[telehead]

Got my heater in and running today, think it is going to be real nice. I ended up making my own "T" for the filler vent. Worked so good , and very easy. I took some 3/4" X .083 tube, cut a piece 3" long, knurled about 1" on each end (for a little extra grip on the hose) then i drilled 1/4" hole on center. After I drilled the hole I angled the bit as far as I could, stuck the pick up line in (1/4" break line) then silver soldered the joint and vwalla! Super stoked! Best part is that it was cheap, like me!!!! cheers...kt

[E350]

telehead: Congratulations!