ANMS Car Service

Small part, big impact! 🛠️ Think of the PCV Valve (Positive Crankcase Ventilation) as your engine’s respiratory system. It’s tiny and inexpensive, but it’s the primary guard against oil leaks and blown seals.

Here is how this little hero works:

1. The Low Speed "Breath" (Low RPM) 🐢
When you’re idling or slowing down, engine vacuum is high. This pulls the internal valve upward, narrowing the passage (Grey Arrow).

Why? It prevents the engine from sucking in too much air, keeping your idle smooth and your fuel mixture perfect.

2. The High Speed "Exhale" (High RPM) 🚀
When you hit the gas, engine vacuum drops, but internal pressure builds up fast. The spring inside pushes the valve wide open (Red Arrow).

Why? This allows the engine to quickly dump out harmful gases and pressure before they can blow out your oil gaskets.

⚠️ Is your engine "clogged"?
At Craft Skills, we find that a dirty PCV valve is a top cause for unexplained oil consumption.

The Pro Tip: Try the "Shake Test." Remove the valve and give it a shake.

Rattle? It’s likely good.

Silent? It’s clogged with gunk and needs to be replaced immediately to save your seals!