bad crank pressure

[slyone696]

Hello:
I have a 1993 laser 1.8 i have had the head boiled and crack checked, and valves redone. Butt i am still haveing a problem. The problem is that when the motor runs for a short period of time it builds up alot of crank case pressure, enough to blow the dipstick out of its tube. So my question is this. is this caused by the rings or a vacum problem of some sort. Im at my witts end here. Any help would be a great help. Thank you.

[slyone696]

Yeah i checked the pvc, and it is good butt to beo on the ssafe side i replaced it, i tell ya man this thing has got alot of pepole boggled lol