Should i delete factory fuel filter or no? - Chevy and GMC Duramax Diesel Forum
11-16 LML Performance Parts Discussion Discussion of Performance Parts For the 2011 to 2016 LML Duramax Trucks No Advertising

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post #1 of 75 (permalink) Old 06-27-2018, 01:17 PM Thread Starter
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Should i delete factory fuel filter or no?

I'm running an air dog 165 4G with CAT filters, fleece cp3 conversion, and the factory fuel filter. Is it a good idea to delete the factory filter/ is it just another element thats restricting fuel flow or is it negligible? any input appreciated

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post #2 of 75 (permalink) Old 06-27-2018, 01:24 PM
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I would leave it in place and service when DIC tells you. It's not restricting anything with a 165GPH pump supplying it.
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post #3 of 75 (permalink) Old 06-27-2018, 01:42 PM
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Flow rate on the filter head is 50GPH....which if you try and pull a 20k lb 5er up a 10% grade @70mph....into a 40mph headwind on the backside of Mount Neverclimb....you 'might' get close to 9 gph consumption.
And that's a BIG 'might'.

Point being, you're not getting close to 50gph, much less the overkill LP @165.
Leave it. You might find it saves you in the future.
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post #4 of 75 (permalink) Old 06-27-2018, 01:44 PM
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If you delete the factory filter head- and if you have a lift pump failure-- there is no way to prime the fuel system. Best to leave the original filter head intact.
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post #5 of 75 (permalink) Old 06-27-2018, 02:17 PM
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I disagree. The factory filter head is prone to leaks. I see the advantage of the priming function in the event of a lift pump failure. However if the lift pump fails you wont be going anywhere to fast anyways. They are pretty restrictive when turned off. Bypass it. Makes the side of the engine look way cleaner too.

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post #6 of 75 (permalink) Old 06-27-2018, 03:16 PM
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Glad we left the stock filter on the 2011 as we got some bad fuel (had water in it) drained about 2" of water in a 20 ounce pop bottle out of the fass water separator and about 1" out of the stock filter after the WIF light came on, hate to think what might have happened to the CP4 without the stock racor filter in place.
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post #7 of 75 (permalink) Old 06-27-2018, 03:19 PM
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Wrong ^^^^Wrong post 5
You can drive around all you want with a LiftPump shut off.
Mines off right now I’ve been driving around, haven’t thought about flipping the switch on.
Deleting the stock fuel filter is one of the dumber things anyone could think of doing.
Liftpump fails your totally screwed, might as well join a RV Road help and keep their phone number on speed dial, just in case.

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post #8 of 75 (permalink) Old 06-27-2018, 03:40 PM
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Quote:
Originally Posted by lb7dirtymax01 View Post
I disagree. The factory filter head is prone to leaks.
After many years of use and tens of thousands of miles/gallons of fuel, it 'could/might' spring a vacuum leak, losing prime.
A product lifespan that greatly exceeds the life record of either of the two more popular LP kits.

However, since with a LP, it no longer runs under a vacuum, your fear of a constant unreliable point of leaks,.... is a moot subject.
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Last edited by Hook'em_Horns!; 06-27-2018 at 04:57 PM.
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post #9 of 75 (permalink) Old 06-27-2018, 04:51 PM
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moot
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post #10 of 75 (permalink) Old 06-27-2018, 04:56 PM
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Quote:
Originally Posted by D_R_C View Post
Mines off right now Iíve been driving around, havenít thought about flipping the switch on.
You added a lift pump, multiple switches, and multiple gauges.... and then choose not to use it?

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