My msp does that. Doesn't seem to go away do I guess driving it everyday saved the seals and leaving it for s couple.months pushed them over.
Not dropping a valve not a big deal. Take cams out, rotate motor tdc for cyliner your doing and do work. Use the compressed air method for putting retainers back in but I've heard it being done with roper and tdc. Depends how your compressing the springs and seating retainers.
No argument its a wh0re. But if I'm honest, valve spring compressor and vasaline isn't any less a wh0re lol.