Having manifold vacuum hose going directly into a valve cover with no pcv valve would cause a huge vacuum leak Brake booster, pcv tube, egr switch, a/c vents, etc Probably the source of your problem
What is a PCV Valve? All You Need to Know About PCV Valves
You do need a breather somewhere either at the oil.
Each time an engine cylinder goes through the combustion cycle, an amount of the exploding gases leaks past the piston rings into the crankcase
Learn the symptoms of a bad pcv valve hose, how it affects engine performance, and follow a simple replacement guide to keep your vehicle running efficiently. If the hose can be replaced with standard bulk hose, i don't see the point If it's an *important* hose (failure causes danger, hardship, or equipment damage) i also wouldn't depend on. What are the most common causes of pcv hose and oil separator failure
Pcv hose and oil separator failures usually come from heat aging, oil vapor exposure, and contamination buildup, and. Understanding the root causes of pcv hose collapse is essential for preventative maintenance and ensuring the longevity of your engine In this summary, we’ll highlight the key factors. When the pcv system goes bad, engines may idle poorly, consume or leak oil, trigger check‑engine lights, and emit more fumes
The root cause is either.
Manufacturers install ports on their manifolds for lots of different reasons
