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Join Date: Nov 2007
Location: Hernando, FL
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The PCV (positive crankcase ventilation) system sends positive pressure in the crankcase (you'll get positive pressure in there due to heat up, blow-by, etc) back through the engine intake. These crankcase fumes contain some oil vapor. The flexible boots that connect the turbocharger to the intake manifold and the intercooler tend to allow this oil to collect and seep through the material. The boots get filthy with oil on the outside and, in the end, can result in a thin oil film all over the engine. Also, diesel itself is an oil and there are a few opportunities for diesel oil to slowly accumulate on the engine. You also have general road grime which can collect.
I wouldn't be concerned until you start to see puddles of oil forming beneath the truck. They will probably be draining down from the engine valley (the area on top of the engine block between the V of the cylinder heads). Shine a flashlight in the valley and dry up anything that may be in there. Check the valley again after a little while to see if you have anything new in there. That will tell you if you have any number of common oil leaks for this engine.
2002 F-250 Lariat Extended Cab Long Bed, 7.3L, Auto, 4x4
- 6" BDS Suspension lift (All spring)
- 315/75R16 BFG A/Ts
- DP-Tuner F6
- DIESELSITE CPR Fuel System
- Turbo-Master Wastegate Controller
- Donaldson AIS Intake w/ "Zoodad" and AIH Delete
- MBRP 4" T304 Exhaust
- Coolant filter, Evans NPG+ Coolant, 203* Thermostat and Billet Housing
- Factory Tech Valve Body
- ISSPRO Gauges (Boost, Pyro, Trans)