I would start with replacing the PCV valve.
can you post a picture? I dont know how difficult it is for you to get parts in Venezuela but you could try ordering any parts from www.FCPeuro.com (if they ship there). They have lifetime warranty on all parts. And if it really comes down to it, you could replace the pcv with a catch can setup. I did that on my vr6.And the intake camshafts are dirty and it looks that the don’t have enough lubrication, is that normal?