Questioning removing oem fuel filter check Valve

the freeze

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Feb 23, 2010
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So Ive got my new nickataine oem fuel filter adapter and I'm gonna be putting on a Kennedy lift pump setup too.

I see that some people remove the internal check valve that is in the oem fuel filter due to a restriction it may or may not cause. I'm all for removing any restriction in the fuel system. However as I understand it that checks purpose is to prevent the fuel from draining out from the ficm and cp3 lines when changing the filter. My concern would then be that I can not bleed the air that is introduced into those lines without modifying those lines and adding a bleed to the tap near the alternator. And if i didn't every time I fired it up after a fuel filter change it would cause wear on the cp3 and injectors by pushing air thru them.

Or am I wrong does the check valve actually keep the fuel from draining back into the tank by introducing air into those lines which is no biggy it would just require a little more effort to purge the lines when changing filters.

Thanx for your help
 

JoshH

Daggum farm truck
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Feb 14, 2007
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I've never seen one of the filter adapters in person, but unless they have a lilttle finger sticking up in the middle to push the ball up when you screw it on the stock filter head, you will have to remove it. If you don't, it will cause a major restriction that will likely cause a low rail pressure issue. If you look down in the stock filter, you will see a little finger in the center that is there to push that ball. You shouldn't have any problem bleeding air, it will just make more of a mess when you do a filter change.
 

the freeze

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Feb 23, 2010
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Ok I that helps. Nickatane says u do t have to remove it but I'm guessing his adapter would push it up anyways. so I mine as well remove the ball and spring. Since it will be held open all the time if I leave it in anyways.

Which brings me to my final question
Does this check prevent the air from Entering the incoming line to the filter or the outgoing line to the ficm.
If it's the outgoing line I think I'll try to find a way to bleed air out using the tap by the alternator. I wonder what I could use????
 

JoshH

Daggum farm truck
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Feb 14, 2007
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Texas!!!
It stops the fuel from draining out between the filter and the CP3. There's really no need to worry about the air. Just prime your filter as usual, and it will fire right up.