XJ6 & XJ12 Series I, II & III 1968-1992

fuel check valve

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Old Sep 13, 2015 | 07:03 AM
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Default fuel check valve

Well my check valve went out a few weeks ago, got tired of trying to find an original, although a kid at the local store found it once, an he no longer works there. So I just bought a run of the mill, check valve and I installed it in the line that comes out of the fuel pump, instead of the bottom line of the fuel block thingy. It doesn't hold pressure. Is there some special something about that block that the check valve has togo to the bottom. the main line goes to the top of the block, so I did'nt see any reason it wouldn't work there. Is it a bad check valve or should I just move it to the bottom port?
Confusing!
 
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Old Sep 13, 2015 | 09:06 AM
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That junction block thingy is an air bleed and is open/exposed to the fuel return system. Your fuel pressure is bleeding off from there. You have the check valve installed upstream of the air bleed.

Install your check valve *downstream* of the air bleed device.....between the air bleed thingy and the engine.

Cheers
DD
 
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Old Sep 13, 2015 | 07:07 PM
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Originally Posted by Doug
That junction block thingy is an air bleed and is open/exposed to the fuel return system. Your fuel pressure is bleeding off from there. You have the check valve installed upstream of the air bleed.

Install your check valve *downstream* of the air bleed device.....between the air bleed thingy and the engine.

Cheers
DD
You da man. I thought something like that when it didn't work right.
 
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Old Sep 17, 2015 | 07:00 PM
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finnaly got the time to change it over today. Doug!!!! you da man, thank you. problems all fixed.
 
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Old Sep 17, 2015 | 09:04 PM
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Glad you're all sorted out

Cheers
DD
 
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Old Sep 18, 2015 | 02:00 PM
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I have also been trying to locate an inline check valve for my car to no avail. Where did you get yours and do you have a part number? Thanks
 
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Old Sep 18, 2015 | 02:48 PM
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Google 'fuel line check valve' and you'll have a hundred choices


Cheers
DD
 
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Old Sep 18, 2015 | 03:25 PM
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Originally Posted by sanchez
I have also been trying to locate an inline check valve for my car to no avail. Where did you get yours and do you have a part number? Thanks
I don't ask for receipts (I've explained that before) so I don't have a part number but I hit it at oreilley. They found it in the book under diesel fuel crap.
I hope that helps.
 
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