Compression Ignition Addict
Join Date: Apr 2007
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Other Info (possible sources):
Weeping return hose from the intercooler that was putting a little oil up on top of the engine that found it's way down the back and to the bell housing.
CAC tubes: The CAC tube oil leak is caused because the crankcase ventilation is routed into the inlet side of the turbo, and oil build up in the tubes is normal, and then it seeps out around the hoses and onto the top of the engine then runs down the rear of the engine onto the bell housing.
Check to see if you have an icp sensor in your right valve cover ( 03 and early 04). if you don’t, then it is under your turbo. The icp sensors have caused many oilleak concerns, especially on the 03 – early 04.
Oil Leaks from Lower Engine Area:
Some 6.0 engine may exhibit an oil leak that appears to be coming from the lower crankcase (bedplate), upper or lower oil pan, rear main seal, or front or rear covers. First inspect the cam and crank position sensors to ensure the leak is not the o-ring on one of these sensors. If the sensor(s) is wet, remove it and replace the o-rings. Cam sensor (driver side): 3C3Z-9N693-HA and -JA; crank sensor (passenger side): 3C3Z-9C064-DA.
An oil leak may occur at front or rear covers if they were removed without cutting the sealing joints behind them. Broadcast Message 1268.
Oil Leaks from Front and/or Rear Crank Seals:
If an oil leak has been verified as coming from either the front or rear crankshaft seals, the crankshaft end play must be checked to ensure it is 0.020" or less. If within specs, replace the seal using the correct tools and procedures. Broadcast Message 1240.
2003-2004 Oil Leak from Head Gasket:
Some engine may exhibit what appears to be an oil leak from the head gasket. Since there is no pressurized oil at the head gasket, a leak at this location is unlikely. Inspect the following area instead: turbo oil feed and return, oil cooler, HP oil pump cover, ICP sensor, IPR valve, valve cover gasket, rocket carrier gasket, Injector and glow plug ports and crankcase breather port. Use florescent dye and an UV lamp to pinpoint the source of the leak. If the leak is from the head gasket, the head should be removed and it and the block checked for flatness. Broadcast Message 0873.
Rear Main Seal Leak:
Some trucks with the 6.0 may exhibit what looks like an oil leak from the bellhousing, presumably for the rear main seal. This actually may be excessive grease from the torque converter pilot melting and running out of the bellhousing. It is recommended that 3 ounces of florescent dye be added to the oil, the truck driven, then the leak inspected with an UV lamp. If dye is detected, the engine should be inspected for leaks on top that may be running down the back of the engine. If no upper leaks are detected, replace the rear main seal. Broadcast Message 1017.
Oil supply line to the turbo
Bedplate gasket - sealing surface for the bed plate on the cylinder block assembly.
Oil Pan/Bed Plate:
· The 6.0L Power Stroke uses a two piece oil pan. The lower half is wider than the bottom of the engine to increase its capacity. Due to this wider oil pan, an upper oil pan is used to adapt the lower pan to the bed plate. The upper pan also acts as an oil baffle.
· The upper pan is bolted to the bed plate. The bed plate replaces the individual main bearing caps. This one piece design results in a more rigid bearing retaining system.
The pick-up tube is bolted to the upper pan and oil is routed through the upper pan and the bed plate to the front cover.
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