Can you id this?

[sam(slim)]

I found a small spring with a disk on one end in the engine valley of my 2001 7.3. The disk has a small pin hole in the center. It looks like a check valve of some type. Can anyone tell me what this is or came out of?

Link to pictures.

[greasyF250]

Any chance it could be part of the fuel pressure regulator. Its different from my 2000, but the small hole in the center and the size , make it possible.

[forddieseldoctor]

That's out of your high pressure oil pump. That's your poppet valves. Someone must have replaced the o-rings on the outlet fittings and dropped one down in the valley.

[sam(slim)]

Thanks, Should I pull the fitting and find out if one is missing? I know they have not been out in the year i have had the truck.

[forddieseldoctor]

I would. But be careful that the other one doesn't pop out when you take it apart.

[jesilvas]

What is the use of the valves?

[forddieseldoctor]

They're check valves. They prevent bleed-off during sitting.

Anyway here's a link to directions to remove the fittings. I would get a new o-ring kit as long as I was taking them out.

HPOP O ring change

[sam(slim)]

Since your post I have been looking for info on them and some people say remove them some say they need to be there so the oil will not drain back. My truck cranks fine even after sitting for weeks so the oil in the lines must not be draining back. I may just leave it out for now till the fittings start to leak.

[forddieseldoctor]

Yeah I've been reading around too and have seen that. I guess it's up to you whether you put them back in or not.

[auriga2909]

I own a 01 F350, my mechanic replaced a broken piston now the truck smokes. Excessive blowby. Blue smoke, what do you think it could be?
My mechanic thinks it could be the fuel injectors, does this sound right?