My TDI has developed an oil leak at the junction between crankcase, sump and gearbox; towards the rear of the car.
Initially I thought it was coming from above, so wasted time replacing the rocker cover and tandem seals, however now Im sure it is either the sump or rear crankshaft seal. The DMF was replaced three months ago and it may have started then, gradually getting worse. The crankshaft seal was not replaced, but is only 6 years old, since the last DMF. As the leak takes over a week of non use, before it stops is that a clue that it is more likely the sump? My guess because of the angle of the engine it takes time for all the oil in the top of the engine to run down the side to the join with the sump. How long is the crank seal likely to leak after use ? I could probably replace the sump but no way attempting a gearbox out job. Sorry lost photo and all is now wet. Opinions invited with thanks.
Initially I thought it was coming from above, so wasted time replacing the rocker cover and tandem seals, however now Im sure it is either the sump or rear crankshaft seal. The DMF was replaced three months ago and it may have started then, gradually getting worse. The crankshaft seal was not replaced, but is only 6 years old, since the last DMF. As the leak takes over a week of non use, before it stops is that a clue that it is more likely the sump? My guess because of the angle of the engine it takes time for all the oil in the top of the engine to run down the side to the join with the sump. How long is the crank seal likely to leak after use ? I could probably replace the sump but no way attempting a gearbox out job. Sorry lost photo and all is now wet. Opinions invited with thanks.