How does a clogged CCV filter cause blue smoke at idle on a 6.7L PowerStroke, and should you delete the box entirely?

[Plenum_Pete01]

My 2017 F-250 (110k miles) has recently started blowing puff clouds of blue smoke after idling at stoplights for more than 2 minutes. Once I get moving, the smoke clears up, but it's getting embarrassing. It's also eating about a quart of oil every 3,000 miles. No blowby at the oil cap.

A senior member on here mentioned that the factory Crankcase Ventilation (CCV) box on top of the driver-side valve cover gets completely saturated with oil sludge, forcing engine oil vapor back into the turbo compressor. If I replace the CCV box, will it stop the oil consumption? Or should I just buy a CCV delete kit and route the hose to the atmosphere like the old 7.3L trucks used to do?

 

[DieselMaster_US]

It’s 100% a clogged CCV filter. At 110k miles, yours is completely saturated with sludge. Crankcase pressure is backing up, keeping the turbo oil from draining, and forcing it past the turbo seals into your exhaust at idle.

Don't bother deleting it unless you want your cabin smelling like a 1990s tractor at every stoplight. Just drop in a new OEM Ford CCV box. It's a 45-minute swap, stops the blue smoke instantly, and buys you another 100k miles.