Fuel leakage/drainage issue from 6.2l filter system

[strelnik]

Steel soldiers and their allies,

I own a 1986 and a 1993 USAF van with 6.2 L engines in them. I drive the 1986 less often and may sell soon, but not before I solve a problem.

The vehicle has extremely hard starting if it sits a week or so. If I start it daily, it's like summer. It has good flters and glow plugs and a strong battery.

I read somewhere that the military filter base has an O-ring that degrades over time and causes the leak down.

I saw a photo of this on the Net, but the photo was so bad and dark I could not identify the location of the fuel base.

Does anyone know what I am talking about? Anyone got photos, etc?

I would rather not mod the fuel system, especially before I sell it, if I do.

Thanks,

S

 

[strelnik]

steel soldiers and their allies,

i own a 1986 and a 1993 usaf van with 6.2 l engines in them. I drive the 1986 less often and may sell soon, but not before i solve a problem.

The vehicle has extremely hard starting if it sits a week or so. If i start it daily, it's like summer. It has good flters and glow plugs and a strong battery.

I read somewhere that the military filter base has an o-ring that degrades over time and causes the leak down.

I saw a photo of this on the net, but the photo was so bad and dark i could not identify the location of the fuel base.

Does anyone know what i am talking about? Anyone got photos, etc?

I would rather not mod the fuel system, especially before i sell it, if i do.

Thanks,

s

bump

 

[TedG]

I believe the hmmwv fuel filtration system is specific to only hmmwv's. Good luck in you quest...

 

[CUCVLOVER]

hello.
Seeing as I don't have a hmmv or have ever worked on one I can not say that this information is the best there is.
So let me see if I can help. You have a 6.2 NA engine from a hmmv in a van correct? What type of filter are you using? Is it a spin on or the old box type that came on cucv's ? The box type is on the left it is the one that has a pressure sensor that is known to leak air into the system when the seals fail. The one on the right is my spin on mod I did to my cucv with a 6.2 engine because I was having the same problem as you. What I did to determine the air leak was in my filer housing is I got a small inline clear filter that I hooked up in place of the factory unit this told me the air was getting in there.

A few pictures of your engine, fuel system ect.. would be a great help.

I hope this helps

 

[gcbennet]

The fuel filter on the humvee is an element contained within an aluminum housing mounted on the LH engine firewall. When you buy a new filter element it comes with a new O-ring. Leakage can happen either at the O-ring itself, or at one of the hoses.

 

[papakb]

Last April I changed out the batteries in my HMMWV and afterwards the truck got very hard to get going after sitting for a few days. After the first start it was fine again. I went thru all the electricals and checked the glow plugs and am now at a point where I suspect that I'm having this same problem with the fuel siphoning back into the tank. I originally suspected that the petcock on the filter was bad but this post makes sense to me. I changed the filter out when I got the truck but haven't changed it since. Sounds like a good project for this afternoon. I'll post the results.

Kurt

 

[Retiredwarhorses]

All of the above, as well as injector drain back hoses...there can be no air in the system or you will have issues.
I had a trauck that had a finger loose drain hose connection...no fluid leak, but truck had rough idle issues, tightened clamp, fixed problem.

 

[strelnik]

hello.
Seeing as I don't have a hmmv or have ever worked on one I can not say that this information is the best there is.
So let me see if I can help. You have a 6.2 NA engine from a hmmv in a van correct? What type of filter are you using? Is it a spin on or the old box type that came on cucv's ? The box type is on the left it is the one that has a pressure sensor that is known to leak air into the system when the seals fail. The one on the right is my spin on mod I did to my cucv with a 6.2 engine because I was having the same problem as you. What I did to determine the air leak was in my filer housing is I got a small inline clear filter that I hooked up in place of the factory unit this told me the air was getting in there.

A few pictures of your engine, fuel system ect.. would be a great help.

I hope this helps

Thanks for your very helpful post.
Following back therapy, I can now work on this again.
Can you tell me the name of the adapter that you used and part number/size of the fuel filter?

Thanks!

 

[CUCVLOVER]

http://www.steelsoldiers.com/showthread.php?145931-Cucvlover-s-m1008-the-green-machine/page5

Here is some pics of the install. I dont have the boxes anymore for the part numbers. But I just had Napa get me the base it is a wix base with 2 in and 2 out. I plugged the ones I didn't use and I used a petcock for a radiator for an air bleeder.