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Crankcase vent elbow leak?


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1999 C2 Cab 6MT 75K miles

 

I have a small oil leak at the right rear of the engine.  Just a drop or two on the garage floor.  I thought it was the cam solenoid seal so I replaced it.  And it is still leaking.  

 

Once I removed the air box (also did the resonator removal and red cap-off trick)  I could see the leak on top.  The crankcase vent elbow is covered in oil/dirt.  But I've seen some threads about a cam position sensor o-ring that could also be the source of the leak. 

 

My question - Is there a way or a trick to tell which one is leaking?  

 

I might just replace them both to be sure.  

 

GENUINE PORSCHE CRANKCASE VENT ELBOW
R99610704751 

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