Fuel Rail Check Valve T444E

[xr_guys]

Hello,

I'm new to the forum and want to say hi to everyone.

Not sure if this is the right section to be posting this question.

My truck is a 2000 International 4700 with T444E (175HP) coupled with 5 spd tranny. I just recently fixed the diesel leak cuase by the lift pump. The diesel is comming from the weep whole of the body of the pump. During the repair processe and while removing the high pressure hose to the passenger fuel rail connected to the lift pump, i discovered the addaptor of the hose to the cylinder head having some kind of a screen filter inside it. Upon further investigation this adaptor is actually some kind of a check valve/pilot jet. This can also be found on the driver side too on the input side of the fuel rail.

What is the purpose of having a check valve/pilot jet at the entry to the fuel rail? I know this engine has multiple flavor of horse power with the same configuration. I wonder if this is a metering thing?

Thanks,
XR

[xr_guys]

bump...

Anyone?

[Chop]

Your truck fuel system is a touch different than the ones in the OBS ,same engine but different fuel delivery and that may explain why you haven't had a response . With a mechanical fuel pump on the OBS ,the excess fuel is returned to the fuel tank by a return line .Are these check valves part of a return system ?