CAT 1R-0750(No lift pump) - Page 2 - Chevy and GMC Duramax Diesel Forum
Maintenance Discuss scheduled maintenace, capacities, filter part numbers, etc.

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post #11 of 14 (permalink) Old 06-20-2019, 11:24 PM
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Yep, that's a good way to do it. I just did it "the other way" and am content.

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post #12 of 14 (permalink) Old 06-21-2019, 07:07 AM
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Originally Posted by jake111 View Post
Yep, that's a good way to do it. I just did it "the other way" and am content.
AirDog and FASS is this way no one seems to have any issues with the LP pulling from the tank, pushing so to speak thru the water separator filter first then the fuel filter on to the engine.
Except for FASS is now thru the fuel filter then water separator filter on to the engine.
IMO

Dan
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post #13 of 14 (permalink) Old 06-21-2019, 07:49 AM
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AirDog and FASS is this way no one seems to have any issues with the LP pulling from the tank, pushing so to speak thru the water separator filter first then the fuel filter on to the engine.
Wrong.
That's not what their design does.

https://pureflowairdog.com/files/ima...ne_diagram.jpg

FWS filters are the most efficient at water removal when the fuel is pulled thru.
This is how the Dmax stock filter is set up, pulling the fuel thru.
And this ^ is why, when you add a Lift Pump for positive pressure forward to the CP3, you should also add an aux FWS filter pre-pump to the mix.

Pushing thru post pump would atomize any water in the fuel as it gets churned up in the pump. Because of this, IMO the in-tank Fleece is a total failure as a mod for our HDs.

Emulsifying your fuel pre FWS is not the way to go for water protection.
All filter mfrs state this about their products, nothing new here.
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post #14 of 14 (permalink) Old 06-21-2019, 07:55 AM
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Yep, your right I was just observing the in and out not paying attention to the gray and yellow flow lines.
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Dan
2007.5 GMC Sierra 3500 SRW L.B. "BLACK" C.C. 4X4 LMM Z71
DIY stock airbox mod, aFe ProGuard 7, OEM drop-in
EFILive ECM ATP - Heavy Tow Tune with Turbo Brake.
EFILive TCM Duramax Tuner
DHD Cold Side High Flow Intake Pipe
DHD PCV Re-Route
AirDog 4G100


2007 Yukon Denail "BLACK" 6.2 gasser
DIY stock AirBox Mod, K&N, Airaid intake, EFILive TCM only tuning
D_R_C is online now  
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