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Thread: Engine oil in coolant expansion tank (B6 1.9 TDI)

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  1. Engine oil in coolant expansion tank (B6 1.9 TDI) 
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    I have a 135k B6 1.9 TDI Bluemotion from 2008 that has recently had oil appear in the coolant expansion tank. There is no mayo like substance on the oil filler cap so I am hoping it's not the head gasket, and there doesn't appear to be any coolant missing.

    I've recently had to have the DPF replaced (the DPF light kept coming on even after long journeys, and eventually the engine fault light came on), of couple of sensors in the exhaust replaced (not sure which ones!) and the EGR valve had to be removed and very thoroughly cleaned. All this happened at the same time so I'm wondering if the oil in the coolant is connected in some way. The engine runs absolutely fine though, and the car has been maintained by the local VW specialist. I actually can't afford to take it back for any more work at the moment so I might have to get my spanners out on the driveway...
     
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  2. Re: Engine oil in coolant expansion tank (B6 1.9 TDI) 
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    I'd check the oil cooler, higher pressure oil migrating through a leak in the cooler into the lower pressure coolant?
     
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  3. Re: Engine oil in coolant expansion tank (B6 1.9 TDI) 
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    Can anyone point me in the direction of some info about how to replace the cooler? I have the Haynes manual and it basically just says "remove the oil cooler" - well, I'm paraphrasing, but that is basically it. I've googled and searched on YouTube but haven't found anything too specific... The local garage wants another £212 to fit it and I just can't drop any more money on the damn thing.
     
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