Crankcase Pressure

[300SD90]

Hey all,

My 81 300SD seems to have high pressure coming from the crankcase. I recently replaced the turbo and rebuilt the injectors with new Monark nozzles. I am getting a lot of smoke coming from the valve cover.

My compression test results were around 380 PSI. Cylinder 5 was pretty low, but I let the cylinder soak in MMO for a few weeks and the compression is now up to 400 PSI.

I did the dancing cap test and it doesn't seem to dance too bad. The dancing completely stops as I increase the RPMs. There is a lot less smoke coming from the tailpipe now that I've rebuilt the turbo and injectors, but the blow by seemed to remain the same. I can see smoke coming from the oil dipstick, but it does not come loose while driving. I could be wrong, but it seems that the pressure from the valve cover is pushing up the fitting that connects the valve cover hose to the air cleaner. Even after buying another valve cover from a member of this forum, it still seems to leak oil from the nuts on the valve cover, and I'm thinking this is due to pressure in the valve cover...??

I have been doing some research and it seems that cleaning the oil separator may do the trick. Does anyone else have any ideas as to what may be causing this? I do not think the rings are the cause since I received good compression test results across the board. My vacuum system seems to be working fine as well (car shuts down instantly, all locks work), so I'm not sure that this would be the issue either.

Thanks!