You need to check your engine to see if it has a breather box. It appeared you were under the impression that b18b blocks don't have them. Not so.

If you have one, be sure you PCV valve is working properly. If it isn't sucking from the intake side, it can't vent the crankcase.

If it doesn't have one, you are on an obd2 block, and like the crv blocks, you have to find a solution for reducing pressure when you build a performance engine. There are several aftermarket kits for venting and catching oil.

If your pressures are unusually high, you may have worn rings/cylinder walls.