Depends on the "O" ring damage.... Could be partially sealing until the pressure rises..... Almost like a small blow off valve.... and then all a once, oil starts shooting out...
Keep in mind..... it hard to diagnose a problem over the internet.... These are only suggestions as to where you should look.... You are in the best place to diagnose the problem....
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![[IMG]](http://www.realoem.com/bmw/diagrams/j/e/225.png)
