1. Gather Your Supplies:
* New PCV valve: Make sure you get the correct replacement part for your specific engine. Your local auto parts store can help you with this if you're unsure.
* Socket wrench and extensions: You'll likely need a socket that fits the PCV valve. Common sizes are 3/8" or 7/16".
* Ratchet: To make turning the socket easier.
* Gloves: To keep your hands clean.
* Shop rags or paper towels: To clean up any spilled oil.
2. Locate the PCV Valve:
The PCV valve's location varies slightly depending on the engine (small block V8, big block V8). However, it's generally found on the valve cover, often near the back. It's a small, cylindrical valve with a hose connected to it. Consult your owner's manual or a repair manual specific to your Impala's engine for the precise location. A quick online search for "[your engine type] 1979 Chevy Impala PCV valve location" will likely yield helpful images.
3. Remove the Old PCV Valve:
* Disconnect the hose: Carefully disconnect the hose(s) attached to the PCV valve. They usually just push on, but some may have clamps.
* Remove the valve: Use your socket wrench and ratchet to carefully unscrew the PCV valve. It might be a little stubborn due to build-up. Go slow and steady to avoid stripping the threads.
4. Install the New PCV Valve:
* Clean the area: Clean the area around the valve cover where the PCV valve sits, removing any dirt or debris.
* Install the new valve: Carefully screw the new PCV valve into place by hand, initially, then tighten it using the socket wrench. Don't overtighten.
* Reconnect the hose: Carefully reconnect the hose(s) to the new PCV valve. Make sure they're securely attached.
5. Test and Check:
Start the engine and check for any leaks around the PCV valve. Listen for any unusual sounds. If everything seems fine, you're done.
Important Considerations:
* Engine type: The exact procedure might vary slightly depending on whether you have a small-block or big-block V8.
* Accessibility: Depending on your engine and accessories, accessing the PCV valve might require removing other components, such as air cleaner housings or parts of the intake system. Consult a repair manual for specifics.
* Repair manual: A Haynes or Chilton repair manual for your specific year and model Impala is a great investment and will provide detailed diagrams and instructions.
* Safety: Always disconnect the negative battery cable before working on any part of the ignition system.
If you're not comfortable performing this repair yourself, it's always best to take your car to a qualified mechanic. This is a relatively simple job, but improper installation could lead to engine problems.
