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replaced crank case valve location at valve cover

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Q: How do you change the crank case ventilation valve on a BMW 740il?
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You need to remove the valve cover ((V8) motor) and remove the spark plug coils, then you can change the plugs.


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I would start by checking the PCV (Positive Crank-case Ventilation) valve. If it is not functioning correctly, you could be getting too much pressure in the crank-case, causeing your leak. If this is the problem, you can buy a new PCV valve for $3-$10 at any auto-parts store.


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