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My 07 SF 3.3 has never had the crankcase ventilation system serviced.

As I understand it, there is no pcv valve. What should I look for or do to be certain the the engine is ventilating properly?
 

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There is a PCV valve on your engine. If you pull the valve from the cover, you should feel vacuum on the loose end with the engine running. Then stick a small wooden dowel or similar into the threaded end to see if the valve moves smoothly.
 

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