Tech is right on this,just because you have crank case pressure it doesnt always mean there is excessive blow by. take your rearend housing for example, plug the vent hole and it will blow gear lube out somewhere, due to the parts rotating and building pressure, generally this pressure on a modern vehicle is sucked back through the carb (ok how new we talking with a carb right?) and reburnt with a one way check valve the pcv valve (positive crankcase pressure) if it has one make sure it only flows one way by blowing in it and its facing the right way, if it doesn't theres the problem, if it doesn't have one install one and route it from the breather to the carb. If you really think its a blowby condition perform a leakdown test to confirm it, but it might be way simpler! best of luck Matt