Compression Ignition Addict
Join Date: Oct 2011
Location: Tehachapi, CA
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Many times if it is leaking that bad, it is in the High Pressure Oil System (which uses oil in the pan). A few places where it can leak into the valley:
1) The High Pressure Oil Pump (HPOP, behind/bolted to the rectangular reservoir on the front of the engine and down in the valley). Sometimes the rear cover plate will leak and there are a couple of plugs on it that can leak.
2) The Injection Pressure Regulator (IPR). Screws into the HPOP.
3) The HPOP hoses (one going to each head). The hose can fail, but more likely is the o-ring(s) that seal the hose fittings (they are separate items from the hoses) at the HPOP and at the heads. I had one at the HPOP fail and lost 8 quarts in 10 miles.
4) O-rings at the plugs on the heads (there are basically ports on each "cylinder position" that are plugged where the HPOP hose would go (see above). The Injection Control Pressure (ICP) sensor on the front port driver's side also has an o-ring.
You could also have leaks in other spots, but I would check those first. Use only Viton o-rings (not Buna-N) for replacements. Diesel O-Rings.com is a good place to get them. Cheers!
1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed
SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.