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Old 02-13-2013, 03:16 PM   #1 (permalink)
OldBlue56
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@#%*ing Fuel Filter Head

History:
-At approximately 135,000 miles I installed a Nicktane CAT adapter on the stock filter head. At this same time I installed new o-rings in filter head as preventative maintenance, since I was in there already. This was all done towards the beginning of 2012.

-In July 2012 I installed an Airdog II 165

-October 2012 my filter head starts leaking fuel everywhere, but only randomly it seems. It's bad enough that it covers the frame rail below the filter. I took the filter head apart and examined it to look for damaged o-rings. I found nothing and put it all back together. Everything is peachy for about a month then bang it starts leaking again.

-So over Christmas while I was installing new injectors I put another rebuild kit in the filter head thinking I must have damaged one of the o-rings.

Problem:
Everything had been fine since Christmas till now. It has started leaking all over again. I can't for the life of me imagine why this thing just randomly decides to start spewing fuel. Everytime I rebuilt it I checked to make sure it held a vacuum and all seals were replaced. When it leaks the entire top of the filter head is covered in fuel and then runs down the filter and onto the frame rail. There is no performance drop or any symptoms of it leaking on than the soaked frame rail I see when I walk by my passenger side.

Any ideas? Could the Airdog be pressurizing too much and pushing fuel past the o-rings? this is getting really frustrating. I hate a leaky vehicle.

Thanks for any help.
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2005 Chevrolet Silverado Crew Cab 2500HD LLY 4x4
EFI Live V2 DSP5 tuned by Idaho Rob (ATP)
Edge Insight CTS w/ ebay backup camera,EGR Blocker Plate, LBZ MP, PCV Reroute,
Pump Rub Upgrade
Transgo SK, swap over to TranSynd, Earl's Temp-A-Cure Transmission, Cooler, Fleece Tapshifter
MBRP 4" Turbo Back Aluminized Exhaust (no CAT), BD Full Bore Exhaust Manifold, Insynerator DSL 3" Down Pipe
Banks 3" Monster Boost Tubes (Driver & Passenger sides), Banks Ram Air Intake for LBZ w/Super Scoop, My Own Nose and Radiator Shrouds and Stack sealing
Nicktane 2 micron CAT filter adapter, AirDog II 165,
PPE Shim Kit, All 8 Ice Picked
Ford Taurus Efans mod(removed), Sound deadened
2005 GMC Sierra 1500 4x4 (2008-2011) 5.3L Gutless wonder
1997 GMC sierra 1500 4x4 (2004-2008) 350 Vortec should have kept it.
1988 Toyota Pickup 4x4 (1998-2004) 2200 RE best little 4 cylinder ever.
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Old 02-13-2013, 06:58 PM   #2 (permalink)
sgtkilroy
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Just delete the factory filtrr head completely and put a CAT 1R 0751filter on the airdog.
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Old 02-13-2013, 07:59 PM   #3 (permalink)
Diesel Wanna Be
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Filling up at the same fuel pump each time?

Biodiesel will cause seals to swell, while #2 will cause them to shrink.

If you're bouncing back and forth between fuels that might be the culprit.
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Old 02-13-2013, 10:35 PM   #4 (permalink)
BHoward6.6
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Same thing happened to me. I removed the OEM fuel filter head and installed a Nicktane Billet Aluminum Filter Head.
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Old 02-14-2013, 12:19 AM   #5 (permalink)
jlawles2
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Have you checked the filter head for a crack?
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Old 02-14-2013, 01:34 AM   #6 (permalink)
OldBlue56
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I have thought about removing the filter head, but want to keep the airdog filters and CAT.

I do fill at the same station every time.

Quote:
Originally Posted by BHoward6.6 View Post
Same thing happened to me. I removed the OEM fuel filter head and installed a Nicktane Billet Aluminum Filter Head.
I was considering this. Haven't researched it enough to know what all is involved.

I did check the head for cracks, none that I could find.
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2005 Chevrolet Silverado Crew Cab 2500HD LLY 4x4
EFI Live V2 DSP5 tuned by Idaho Rob (ATP)
Edge Insight CTS w/ ebay backup camera,EGR Blocker Plate, LBZ MP, PCV Reroute,
Pump Rub Upgrade
Transgo SK, swap over to TranSynd, Earl's Temp-A-Cure Transmission, Cooler, Fleece Tapshifter
MBRP 4" Turbo Back Aluminized Exhaust (no CAT), BD Full Bore Exhaust Manifold, Insynerator DSL 3" Down Pipe
Banks 3" Monster Boost Tubes (Driver & Passenger sides), Banks Ram Air Intake for LBZ w/Super Scoop, My Own Nose and Radiator Shrouds and Stack sealing
Nicktane 2 micron CAT filter adapter, AirDog II 165,
PPE Shim Kit, All 8 Ice Picked
Ford Taurus Efans mod(removed), Sound deadened
2005 GMC Sierra 1500 4x4 (2008-2011) 5.3L Gutless wonder
1997 GMC sierra 1500 4x4 (2004-2008) 350 Vortec should have kept it.
1988 Toyota Pickup 4x4 (1998-2004) 2200 RE best little 4 cylinder ever.
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Old 02-14-2013, 01:35 AM   #7 (permalink)
OldBlue56
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Quote:
Originally Posted by BHoward6.6 View Post
Same thing happened to me. I removed the OEM fuel filter head and installed a Nicktane Billet Aluminum Filter Head.
Actually do you happen to have any pictures of your setup like this? I would be interested in seeing it.
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2005 Chevrolet Silverado Crew Cab 2500HD LLY 4x4
EFI Live V2 DSP5 tuned by Idaho Rob (ATP)
Edge Insight CTS w/ ebay backup camera,EGR Blocker Plate, LBZ MP, PCV Reroute,
Pump Rub Upgrade
Transgo SK, swap over to TranSynd, Earl's Temp-A-Cure Transmission, Cooler, Fleece Tapshifter
MBRP 4" Turbo Back Aluminized Exhaust (no CAT), BD Full Bore Exhaust Manifold, Insynerator DSL 3" Down Pipe
Banks 3" Monster Boost Tubes (Driver & Passenger sides), Banks Ram Air Intake for LBZ w/Super Scoop, My Own Nose and Radiator Shrouds and Stack sealing
Nicktane 2 micron CAT filter adapter, AirDog II 165,
PPE Shim Kit, All 8 Ice Picked
Ford Taurus Efans mod(removed), Sound deadened
2005 GMC Sierra 1500 4x4 (2008-2011) 5.3L Gutless wonder
1997 GMC sierra 1500 4x4 (2004-2008) 350 Vortec should have kept it.
1988 Toyota Pickup 4x4 (1998-2004) 2200 RE best little 4 cylinder ever.
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Old 02-14-2013, 08:43 PM   #8 (permalink)
mtl_dmax
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What line pressure (psi) are you running on the Airdog?
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Old 02-14-2013, 09:04 PM   #9 (permalink)
JC1843
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Where is it leaking from-??
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Old 02-14-2013, 09:09 PM   #10 (permalink)
Mr.Duck
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if I may jump in

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