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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

Unknown check valve

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Old Nov 5, 2020 | 03:47 PM
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Unknown check valve

Hi, I am working on a 2003 Ford f450 6.0 powerstroke. The truck had a no start when hot so I diagnosed it to be a broken o-ring where the oil rail connects to the injector. I have since replaced all of those o-rings and have pressure tested it. Everything seems to be in working order and has no leaks. My problem is that while disassembly a what seems to be one way check valve has showed up on my work bench. I have no idea where it came from or where it's supposed to be. I have pulled the cab off the frame to expose the engine. So a lot of parts have been taken off of the truck.Just wondering if anyone out there knows where this check valve would of come from. Thank you.


 
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Old Nov 6, 2020 | 03:42 PM
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That is a check valve from inside the Bendix hydroboost.
 
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Old Nov 6, 2020 | 03:46 PM
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nothing I've ever seen. Are you sure it was your workbench. I found $20 in my pocket once, but they weren't my pants.
 
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Old Nov 6, 2020 | 04:30 PM
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Originally Posted by IHateCommieCars
nothing I've ever seen. Are you sure it was your workbench. I found $20 in my pocket once, but they weren't my pants.
I just told him what it is. I’m 1000% positive it’s from inside the hydroboost. I rebuilt mine a few months back and that check valve is a key part.
 
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Old Nov 6, 2020 | 04:45 PM
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Originally Posted by SmackDaddy
That is a check valve from inside the Bendix hydroboost.
Awesome thank you
 
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Old Nov 6, 2020 | 05:37 PM
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Old Nov 6, 2020 | 08:43 PM
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I knew I'd never seen it. Haven't every had a hydroboost issue - I'm sure I will now though.
 
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Old Nov 6, 2020 | 08:54 PM
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Originally Posted by IHateCommieCars
I knew I'd never seen it. Haven't every had a hydroboost issue - I'm sure I will now though.
I rebuilt and resealed mine and it still leaked. Bought a new Motorcraft unit from RockAuto.
 
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