1988-190D 2.5 Need Help

[jim16671836]

Has anyone on here have any experience with the 190D 2.5 from 1988 and maybe other years. This engine has vacuum lines that start on the valve cover and split into 5 vacuum lines that go to each of the intake runners.. This vacuum system is in poor condition and when the engine is started the engine oil starts pushing out the oil dip stick tube. Why is the lower end(crankcase) area being pressureized??? Need help and any will be appreciated..