Q: blow by around pcv and around oil breather cap.

Hi there. Engine blow-by is the result of combustion gasses getting past the piston and/or piston compression rings, this builds crankcase pressure. The PCV (positive crankcase ventilation) valve system is designed to remove the pressure and recirculate the gasses back into the intake manifold. When the blow-by overcomes the PCV system, evidence will be seen at the PCV, oil cap, and KV breather filter. Excessive blow-by generally is an indication of worn cylinder walls and/or piston rings. The modifications to the upper engine and improperly adjusted valves are probably enhancing the blow-by. I recommend having your vehicle’s engine blow-by be diagnosed and repaired by a certified technician, such as one from YourMechanic.