Quote Originally Posted by stotzbotz View Post
I'm not sure if a compression test this early on will be an accurate indication of anything but I can see what I'm getting at this point. Maybe I should stop bothering you good folks and just give the motor more time to seat the rings.
The smoke coming out of the PCV port when valve was removed usually is an indication of positive pressure in the crankcase (blow by), usually this condition rules out an internal vacuum leak (leak on the underside of intake manifold) causing the smoke. While some crankcase pressure is normal (especially during break-in), usually the PCV system handles it and by lowering the crankcase pressures aids the seal at the rings and lessens the chance of oil slipping past the oil seals at the valves.
Excessive crankcase pressures that overcome the PCV system are usually caused by piston rings not sealing correctly. While this can occur during break-in, it seldom gets worse as the break-in procedure continues. Extreme crankcase pressures can sometimes be felt at the PCV port by placing your hand over the valve cover port, with the pressures trying to escape around your hand. This extreme condition in a new motor is almost always caused by a serious ring failure (incorrectly clocked or broken rings). And, a compression test will show the low cylinder pressure at the trouble cylinders. If damaged or broken rings exist, continuing to operate the motor will only increase your damages.