LLY: @#%*ing Fuel Filter Head

[OldBlue56]

Originally Posted by mtl_dmax

What line pressure (psi) are you running on the Airdog?

Unfortunately I don't have any gauge for this, but it is supposed to come set from the factory at around 8 psi. From what I have researched if the pressure is set too high on the LLY OR lb7 they will idle rough.

I could check where it is set, just to be sure I guess.

Originally Posted by JC1843

Where is it leaking from-??

Can't really tell for sure, cause it is an intermittent deal. I have sprayed it down with brake clean and sat and watched it for probably 15 minutes a few times trying to see where it comes from, but the darn thing never leaks when I can watch it.

Originally Posted by Mr.Duck

I have/had the same issue, mine was seeming from the thin O-ring under the plunger. No damage to the o-ring

This is the only thing I can figure on mine as well. Since the entire top of the filter head is covered in fuel. I just don't know how to fix it other than deleting the filter head, but I would really rather not. Just in case the lift pump fails at some point down the line.

Thinking about just buying a new filter head from Dmax Store they have em for $130. Maybe mine does have a really small crack or something that I just am not seeing.

I'll check the pressure setting on the AD first for sure though.

By the way thanks for the replies.

[Diesel Wanna Be]

I'm running 10.5 PSI without issue.

[mtl_dmax]

Originally Posted by OldBlue56

This is the only thing I can figure on mine as well. Since the entire top of the filter head is covered in fuel. I just don't know how to fix it other than deleting the filter head, but I would really rather not. Just in case the lift pump fails at some point down the line.

Thinking about just buying a new filter head from Dmax Store they have em for $130. Maybe mine does have a really small crack or something that I just am not seeing.

The stock filter head in good condition should be able to take any pressure the Airdog can put out (above 12 psi and you risk damaging the FICM which causes poor idle, rough operation, etc). Unless you are dead set on deleting the stock filter head, I would just get yourself a brand new filter head GM P/N 12642623) and be done with it all. That was you still maintain the ability to prime if needed in the future.

These guys have pretty decent pricing too...
http://www.partszoneonline.com/parts...=&srch4=&srch5=

[Mr.Duck]

I'm running dual Kennedy's on mine, not sure on pressure.

[OldBlue56]

Originally Posted by mtl_dmax

The stock filter head in good condition should be able to take any pressure the Airdog can put out (above 12 psi and you risk damaging the FICM which causes poor idle, rough operation, etc).

That's what I was thinking. I figured that filter head should be able to handle whatever the pump can throw at it.

Unless you are dead set on deleting the stock filter head, I would just get yourself a brand new filter head GM P/N 12642623) and be done with it all. That was you still maintain the ability to prime if needed in the future.

Nope definitely not set on deleting it. Wanting to keep it for the exact reason you list. I want to be able to prime it if my pump decides to crap out at some point.

These guys have pretty decent pricing too...
http://www.partszoneonline.com/parts...=&srch4=&srch5=

Ordered! This is what I was looking for just couldn't find a good price on it till you posted this link, Thanks.

[OldBlue56]

Well, finally got around to installing the filter head. I was very surprised when I got the part it, came with a stock fuel filter and WIF sensor along with it. I thought it would just be the filter head, but I was pleasantly surprised for once. Thanks to MTL posting that link.

So far so good only been on for a day so we will see. Can't imagine why it wouldn't work though.