1. Locate the PCV Valve:
* Most common location: The PCV valve is usually located on the valve cover, near the back of the engine. It's a small, usually plastic, valve with a hose connected to it. It might have a hose going to the intake manifold and another to a breather tube (often connected to the air cleaner housing). Look for a small, cylindrical device with a hose or two attached.
* Consult a repair manual: A repair manual specific to your 1980 Buick Century 231 V6 will show you exactly where the PCV valve is located on your particular engine. This is highly recommended. A Haynes or Chilton manual is a good investment for DIY car repairs.
2. Gather Your Tools:
* New PCV valve: Make sure you purchase the correct replacement valve for your 1980 Buick Century 231 V6. The part number can be found in your repair manual or at an auto parts store.
* Wrench (possibly pliers): The PCV valve is usually held in place by a simple push-in fit or sometimes a small retaining clip. You may need a small wrench or pliers to loosen or remove any retaining clips.
* Shop rags or paper towels: To clean up any spilled oil.
* Possibly a socket: depending on how your PCV valve is fastened.
3. Removal Procedure:
* Disconnect the hoses: Carefully disconnect the hoses connected to the PCV valve. Take note of where each hose goes so you can reconnect them correctly.
* Remove the valve: If the valve is simply pushed into place, gently pry it out using a flat-head screwdriver (gently!), being careful not to damage the valve cover. If there is a retaining clip, carefully remove it.
* Inspect the valve: Before installing the new one, inspect the old valve. Check if the diaphragm inside is torn or damaged. This will help you understand why you needed to replace it.
4. Installation Procedure:
* Install the new PCV valve: Insert the new PCV valve into the valve cover, making sure it sits correctly. If there was a retaining clip, replace it securely.
* Reconnect the hoses: Reconnect the hoses to the new PCV valve, making sure they're securely attached.
* Check for leaks: Start the engine and check for any leaks around the PCV valve and hoses.
Important Considerations:
* Engine oil: Be prepared for some engine oil to spill out when removing and replacing the valve.
* Engine temperature: Let the engine cool completely before working on it to avoid burns.
* Repair manual: Again, using a repair manual specific to your vehicle is highly recommended. It will provide detailed instructions and diagrams specific to your car's engine.
If you're uncomfortable performing this repair yourself, it's always best to take your vehicle to a qualified mechanic. This is a relatively simple job, but working on a car engine does carry some risk.
