I need some advice with the HFCM in my 2005 F-250 4WD Diesel.
I just replaced the fuel filter and tried to re-install the water separator drain plug. It looks good, but it will not tighten. It threads on loosely but keeps spinning. As I can't seat it, I assume it will pop out when driving.
Answers to following would be a big help:
When I removed it, a half circle of steel came out in the plug's threads. I am assuming that this is a broken thread from inside the HFCM threads. This sliver of metal is not an engineered part by any remote chance?
I would definitely say that the threads inside have stripped out, and it is not an engineered piece.
Am I right to assume that the only way I am going to fix this is by replacing the entire cover of the HFCM?
I would agree with your assumption, but someone else may chime in with other info.
Can the cover of the HFCM be swapped out with the drive shaft in the way, or will I have to drop that first?
Yes. I have taken mine off and reinstalled it with the drive shaft on. I will suggest though that when reinstalling the cover be care not to strip out the mounting holes in the cover and housing. Ask me how I know.
I see part number 6C3Z-9B249-A at Amazon for $118. Is that the one I need, or is that more than I need?
I am not sure about the part number. I ended up using a bigger screw to hold my cover on and then found a guy her on the org that had an extra HFCM laying around and sold it to me for like $50-$75. You might consider trying to find a used unit and go from there.
If I am to replace the entire cover, could I try a temporary fix by permanently sealing the drain plug in place with some JB Weld?
I'm not sure about that route, but someone else might.
Any other relevant advice from someone who has replaced a HFCM cover would be much appreciated.