1. Some oil in that line is normal. The vapors collect in there under boost conditions.So here's my question, what is my next step? Could the check valve be malfunctioning even though the nipple is there? Could something else be wrong with the system somewhere else? And will my Cruze ever give me a break and just work for more than a week without stressing me out?
View attachment 301637
2. Yes, but only of it's gummed up.
3. There could be.
4. Not if it was neglected somewhere in it's life. The LUV/LUJ four engine is one of GM's poorer designs. If taken care of from the start, it can be a good engine.