08 F350 6.4 blowing blue smoke after pull

ablokzyl · March 21, 2012

So any way to tell which one is at fault? Hotline says to just read the WSM.....but the only thing the WSM say about it is to pull them and check the feed and return passeges for blockage

Keith Browning · March 21, 2012

Usually the bearings are SHOT when they are leaking oil. Performing bearing clearance check will identify excessive axial and radial shaft movement if simply going by feel isn't obvious.

One word of caution though, most of the time a failed turbo on this engine is due to either a lack of maintenance or an ongoing fuel dilution of the engine oil. Be sure of which scenario you have on your hands. Review service and repair records. Remove the banjo bolts for the oil feed lines at both turbos before beginning removal. Inspect the bolts and fittings for sludge and in severe cases, the oil will coke up and for a crust in the bolts and fittings. I have seen this several times. The holes in the bolts close up and the bearings starve for lubrication.

Such instances warranty coverage may be in question.

Refer to WSM section - 303-04D Fuel Charging and Controls — Turbocharger: DIAGNOSIS AND TESTING

lmorris · March 21, 2012

If you do have the turbos off, check the oil drains as well. I had one that was full of sludge as well. New turbos would suffer the same fate if missed.