505 GTD oil leak

[patmowatt]

I have a 505 GTD with an oil leak from the connection at the oil filter housing end of the oil pipe that feeds the turbo. I initially thought that the leak was from the filter housing to block seal, but have changed the gasket and am 100 percent certian it is not that. I have taken the filter housing off, checked for a problem inside the threaded connection and also checked the pipe and threaded connector and see nothing wrong with either. I have tightened it back together as tight as I dare (very tight) and still the bloody thing leaks. I blew down the oil pipe to the turbo and it seemed to be blocked, should it be like this, or is it possible that the fault is with the turbo and the weakest point happens to be at the filter housing connection, once the oil pressure has built up, the connection leaks. The car is drivable, but leaves a nice few drops of oil whenever I stop, I also think that some of the oil is getting into the bellhousing and think that the clutch might start slipping soon. Does anyone know if oil is pumped at high pressure to the turbo?
Can anyone help please?
Thanks for reading this far, Pat

[arcaman]

Hi, is this problem still current? Oil is certainly pumped at pressure to the turbo, and the turbo is likely to begin screaming and failing if it's starved of oil. It could be worth undoing the pipe at the turbo as well (if it's possible) and then blowing through, but do take care not to bend anything if the joints are a bit seized. You could try refitting the offending joint after wrapping it with PTFE (plumber's) tape on the threads, but that would only cure it if the threads are worn/sloppy fit. I presume you have newish oil and a recent new filter -- check that it's the correct one as some have innards to suit a particular engine type. Apology if this is all obvious to you!