03 6.0L high psi oil issues...diesel tech is out

[Andrew]

i have a 2003 f250 6.0l i am noramlly a drivability tech but have my deisel certs. our diesel tech is out sick and i have got a 6.0l that didnt build more than 180-190psi of icp. i tore off drivers side valve cover and applied air and heard escaping near rear of the head. figured pump fitting or oring would be leaking due to advise from other techs. tore down to high pressure pump check ball is still inside pump and smoke tested pump but found no leaks.also found icp leaking oil. at this point kinda assuming the icp is hanging up causing loss in icp needed. any ideas or other things or ways to check to make sure everything is ok with pump? or what other issues there could be?

[Andrew]

i meant ipr hanging up not icp lol

[Keith Browning]

Sounds like YOU are the diesel tech now.

 

It seems like you have the basic approach right but while STC fittings are common, the stand pipe and dummy plug seals at the oil rails have become just as big of a problem and depending on experience, they are now a more common failure. I also want to ask you if you commanded the IPR closed when you air tested the system?

[Andrew]

yes commanded the ipr closed. but being that its a 2003 i see no dig dummy plugs in it. lol cutting my teeth on this thing haha

[mchan68]

High mileage '03 6.0L low ICP issues USUALLY end up being the pump itself. You could also dead head the pump using the block-off tools to both banks which is exclusive to '03 engine applications to test the output. Off the top of my head, I believe the spec is 1500 psi MINIMUM with IPR duty cycle commanded above 60%, provided you have good strong batteries and sufficient engine cranking RPM.

[Andrew]

its got 207,000 miles on it. lol its tough its my first 6.0

[Keith Browning]

There I go flat rate reading again... 2003... I agree with Mike on the pump.

[Mekanik]

+1 on the pump, but I think you should also check the low pressure oil system. To do this remove the oil filter and jump the starter wire so the engine will crank over. The oil filter housing should fill up with oil.

[joshbuys]

+1 on the pump, in my experience with these, a leak in the system usually gets pressure building around 300 psi, and when the pump is junk it's usually around 200 psi, just something I've noticed in my time

[cbriggs]

+1 more on the pump, but definatly dead head it to test.