6.7L Power Stroke Engine and Drivetrain
Discussion of the 6.7L Power Stroke diesel engine and drivetrain in the 2011-Up Super Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.7L Power Stroke engine.
I noticed an oil leak on an new 2012 after 1.500 miles. It was dripping off the RH side of the front cover. I took it in to the dealer and after using a dye marker, they replaced the gasket on the front cover. They were not satisfied that was the source of the leak and pulled the air intake to get to the turbo. Sure enough the valley was full of oil and the turbo oil line appeared to be leaking from the lower fitting. I looked at the fitting and could not believe it was not a flared steel fitting. The upper and lower fittings thread into the turbo on the top and the pillar on the bottom. The steel oil line inserts into the fittings with an internal o-ring providing the seal. A clip holds the steel line from popping out of the fitting. There is a cast groove in the valley to channel oil out to the front cover.
Why in the world is this not a flared steel fitting? I have seen this type of fitting on shovel head Harley engines. They always leak after about a year. I was talking to my brother, who is an A&P mechanic (airplane), and he thought it should be a flared steel fitting as well. According to the mechanic, there was trouble with the earlier 6.7's in 2011 with leaking turbo oil lines. Supposedly they have been improved. It doesn't look like it to me. Not happy and after 5 days the truck is still at the dealership with a new oil line and fittings on order.
A new oil line with flared fittings could be made, but since it is under warranty and being repaired under warranty, I will continue with the factory oil line. At least now I will know what to look for in the event another leak occurs. It is very difficult to determine the source of a leak from the front of the 6.7. There are numerous parts, hoses etc. blocking any view. All I could tell was oil was running down the front RH side just above the oil pan. I could not see any further up the front cover while viewing above or below. Nor could I see down into the valley without removing the air intake.
On the bright side, the 6.7 is a pulling machine. I am very impressed and hope that the oil leak is permanently cured.