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Mystery oil leak on glk250 (om651 engine)

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Mystery oil leak on glk250 (om651 engine)

 
Old 05-17-2019, 12:24 AM
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Glk250
Mystery oil leak on glk250 (om651 engine)

Hello, would anyone happen to know where the line at the back of the om651 engine leads to? And why it would be leaking oil? Iím thinking possibly a drain for the valve galley in the center of the valve cover where the injectors go, or maybe a tattle tale from the cylinder heads or over flow from the engine block/ oil pan..




Iíve ordered a valve cover gasket but Iím hoping someone could shed some light before I start disassembly. Iíll attach photos of the hose in question itís routed down the drivers side of the engine and is tethered to the side of the bellhousing. It is #240 in the diagram. Thanks -Ryan




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Old 05-17-2019, 01:13 AM
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Ok, I think Iíve got it figured my guess is this hose is a secondary crankcase vent (to atmosphere) as a fail safe should the primary crankcase breather become plugged in order to avoid excessive crank case pressure which would throw codes and probally blow out seals/be hard on components. Iím going to clean/replace pcv system when I get around to it and see if this remedyís the leak. I will post photos and results should anyone else ever have this problem.
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Old 05-17-2019, 09:04 AM
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Subscribed. Good luck and post back!
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