Well, the "safest" things is to leave it. But that is not the most covenant thing. I would weigh out the inconvenience to the price of repair. I would guess the damage is done. I would drive it home with low RPM's. (to keep crank case pressure low)

It has to come apart any way. And if you blow a gasket..... So what. It has to come apart anyway. And the added cost of a gasket is what? $15-$20?

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Pro motocrosser since 2005. First time BMW owner.
2002 4.4 E53