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Message: [QUOTE="6.7Bison, post: 1563595, member: 32432"] The CCV filter lives in this weird limbo of is it or isn't it a maintenance item. Ford doesn't give an interval for the box (for certain the box one without the filter). Ford got away from the filtered design and went back to the baffled box. Either way they can still gum up/plug up and cause excessive crankcase pressure which leads to oil leaks. I heard one diesel shop was recommending changing the CCV every 50,000 miles as they were having good luck avoiding the "common" oil leak locations (turbo, main seal, upper oil pan). If you change it either write down IQAs or keep the old lid if you think you may need them later. [/QUOTE]

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