2002 LB7 Fuel Leak by Cooler

[SmokeShow]

Finally finished the power steering hose & hot side intercooler pipe replacement and new shocks all the way around and upon wrapping up the rear shocks yesterday, it was noticed that the truck has sprung a fuel leak. It's leaking where the braided hose crimps to the hard line near the fuel cooler. Is this a known issue where there's upgrade parts to put back in their place (like the power steering hoses), or just cobble some new fuel hose in there with adaptors from hard line to flex hose? Really want to avoid dropping the tank or removing the bed because the tank was literally just topped off Sunday and I'm not 100% sure I'd be able to get the bed off due to a stuck "turnover ball" gooseneck hitch. What are my options?

 

[DuramaxRamRod]

Clean the rust off and cut the steel lines and pull the quick disconnect fittings off the cooler and run rubber lines with hose clamps. Thats how I fixed my Dads LB7.

 

[SmokeShow]

Just push the hose over the tube & put a clamp on it? Or is there a better fitting to transition from straight tube to hose?

 

[DuramaxRamRod]

I'm sure there's a better fitting but I just put the hose on the tube with a hose clamp. Didn't want to buy new lines or replumb everything at that time.

 

[2004LB7]

when I do that, I flare the end of the tube some to help keep the hose from slipping off

 

[ZeroGravity58]

You can buy tube to AN fittings on summit and replace with new 3/8 braided line if you want.

 

[SmokeShow]

You can buy tube to AN fittings on summit and replace with new 3/8 braided line if you want.

This is more the route I'd been thinking of taking if it doesn't require a flaring tool or anything since I don't have one. I suppose I could buy one to have for any such occasion in the future. Always a good excuse to add some tools to the stash. Then I'd just get a straight/inline pushlok fitting for tying the new hose into the existing hose.

 

[ZeroGravity58]

Earl's Performance AT165006ERL Earl's Performance Tube Adapter Fittings | Summit Racing

Free Shipping - Earl's Performance Tube Adapter Fittings with qualifying orders of $109. Shop Fittings and Adapters at Summit Racing.

www.summitracing.com

I've used these on my truck then use regular hose ends to make up the piece. The only thing is sometimes it take a little work to get them to seal on the steel line but they will. To me they look better then rubber line. Not that anyone will be seeing them but I'm picky

 

[SmokeShow]

Earl's Performance AT165006ERL Earl's Performance Tube Adapter Fittings | Summit Racing

Free Shipping - Earl's Performance Tube Adapter Fittings with qualifying orders of $109. Shop Fittings and Adapters at Summit Racing.

www.summitracing.com

I've used these on my truck then use regular hose ends to make up the piece. The only thing is sometimes it take a little work to get them to seal on the steel line but they will. To me they look better then rubber line. Not that anyone will be seeing them but I'm picky

Digging on Summit last night and I tried to put together a setup like that but I wanted a pushlock style barb to put on that fitting and all the barbs were too little that would thread onto it. I've not bought a lot of fittings in my day. I feel like it'd be 1000x easier if I could go put my fingers on them and pick them out rather than making sure I'm putting the right combos in my cart online.

There was (1) 3/8" brass compression fitting for the tube side with a 3/8" hose barb (regular, not for push lock). But all the reviews said the bard was actually too small for 3/8" hose so thats a no-go. Bummer because that's almost exactly what I wanted.

And slightly off topic... I guess I'm a complete idiot , but I never knew "AN", as in AN fittings, stands for Army-Navy. Mind blown when I saw that spelled out in a description on Summit Racing.

 

[Ron Nielson]

https://en.wikipedia.org/wiki/AN_thread

 

[ZeroGravity58]

Fragola Performance Systems 209006-BL Fragola Performance Systems Series 8000 Push-Lite Race Hose Ends | Summit Racing

Free Shipping - Fragola Performance Systems Series 8000 Push-Lite Race Hose Ends with qualifying orders of $109. Shop Hose Ends at Summit Racing.

www.summitracing.com

Summit Racing SUM-260690B Summit Racing™ Twist-Tite Swivel Hose Ends | Summit Racing

Free Shipping - Summit Racing™ Twist-Tite Swivel Hose Ends with qualifying orders of $109. Shop Hose Ends at Summit Racing.

www.summitracing.com

You can use these too. It's easy to use the fittings I listed in the first post with a piece of nylon braided line and regular 6an straight fitting. The fittings aren't hard to make up. All you need is a couple basic tools

 

[SmokeShow]

Fragola Performance Systems 209006-BL Fragola Performance Systems Series 8000 Push-Lite Race Hose Ends | Summit Racing

Free Shipping - Fragola Performance Systems Series 8000 Push-Lite Race Hose Ends with qualifying orders of $109. Shop Hose Ends at Summit Racing.

www.summitracing.com

Summit Racing SUM-260690B Summit Racing™ Twist-Tite Swivel Hose Ends | Summit Racing

Free Shipping - Summit Racing™ Twist-Tite Swivel Hose Ends with qualifying orders of $109. Shop Hose Ends at Summit Racing.

www.summitracing.com

You can use these too. It's easy to use the fittings I listed in the first post with a piece of nylon braided line and regular 6an straight fitting. The fittings aren't hard to make up. All you need is a couple basic tools

THESE hose ends?

 

[ZeroGravity58]

THESE hose ends?

Yes use those and use the nylon braided 6an hose. The stainless hose is nice but it will destroyy anything that it touches. The nylon hose works great and you can make them fit how ever you want.

 

[Hate2Looz]

I would just put a quality set of replacement lines on it. The lines look like they are starting to get rusty anyway.

 

[JoshH]

If you cut the crimp collar (being careful not to cut into the tube), the tube is already flared for the hose. You can just push new hose on and clamp it.

 

[PureHybrid]

I find it much easier to get on Holley's website to look for fittings. Using Jegs or Summits website can be irritating if you're looking for something specific

 

[ZeroGravity58]

I find it much easier to get on Holley's website to look for fittings. Using Jegs or Summits website can be irritating if you're looking for something specific

I agree I miss their old sites, to me they were so much easier to navigate. Half the time I can't find what I'm looking for and go on Google and search it pops right up on their sites....

 

[turbo_bu]

So I looked at my 04 and noticed some pretty crusty connections down at the fuel cooler end. I am wondering how guys are either fixing those ends, or are they just replacing the cooler?

 

[SmokeShow]

I would just put a quality set of replacement lines on it. The lines look like they are starting to get rusty anyway.

About 4-6” back from the leak, the lines look new. Just the very end is crusty like the pics in my OP.

 

[SmokeShow]

If you cut the crimp collar (being careful not to cut into the tube), the tube is already flared for the hose. You can just push new hose on and clamp it.

the crimped collar plus about 3-6” of line is crusty. The rest of the tubing looks basically new. So cutting them back a little ways from thejunction is going to be necessary.