Crankcase pressure

[brian@cjcontractors.net]

Question guys

I have a 1988 rd690. With a 300 ...it's blowing oil out the dip stick...I've cleaned the blow by tube and checked the compressor had it rebuilt and it's still doing it ...a old timer told me the turbo is prob shot ....so I pulled off the hoses and on the pressure side that feeds the intercooler it was drenched with oil ...so I guess what I'm asking can this be possible if the seals are bad in the turbo ...I've never had a turbo go bad on my Mack's before

Thanks in advanced