EGR Hose Leak - Ford Powerstroke Diesel Forum
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post #1 of 4 Old Today, 04:50 AM Thread Starter
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EGR Hose Leak

2005 F-350 with 116K. Getting cold here in New England. Short story is I was in the last stages of swapping over to ECL from Ford Gold. I was on the last cycle of running distilled water through the system and realized I better get the new coolant in.

Put new coolant in a few days ago and came out next morning to find it had dumped. I started it up and noticed a leak coming down over the starter on passenger side rear. I have a fixur6 backflush valve installed and thought maybe it was coming from there. After some more troubleshooting I used an inspection camera and found it was coming from the EGR hose. The hose is orange so based on searching that is old.

From searching old posts, I see two gaskets others have purchased:

3C3Z-9N693-EA - o-ring for oil cooler cap
3C3Z-9N693-FA - small o-ring

If I buy the new hose, do I need gasket 3C3Z-9N693-FA also? Not sure where it goes. I want to try and do this repair on Sunday.
Thanks
Nick

2005 Ford F-350 Super Duty 4dr SuperCab XLT 4WD LB

Last edited by nicksorg; Today at 05:00 AM.
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post #2 of 4 Old Today, 08:46 AM
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These guys can probably help answer that question.

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post #3 of 4 Old Today, 09:10 AM
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Those seals (o-rings) go on the EGR coolant supply port housing that is on the oil cooler. I am not sure if the fixur6 modification changes it, but in stock form, you should change those seals when you remove the coolant supply port housing to install the hose. I am 99% sure that they don't come w/ the blue hose.

Pic of the hose (no o-rings shown):
https://www.tascaparts.com/oem-parts...let-4c4z8592aa

But from here:
https://parts.autonationfordwhitebea...let-4c4z8592aa
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Mark
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post #4 of 4 Old Today, 09:11 AM
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The updated blue hose is a 4C4Z-8592-AA
the 3C3Z-6N693-FA is the internal o-ring on the water valve, if you pull the valve replace it
I've heard that the hose can be replaced without removing anything else but I've never done it so I can't corroborate that in any way

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