Changing the PCV valve is relatively straightforward:
1. Locate the valve: As mentioned above, find the small black plastic valve on the valve cover.
2. Disconnect the hoses: Carefully disconnect the two hoses attached to the PCV valve. They may be slightly stiff; a gentle tug should suffice. Have a rag or shop towels handy to catch any oil that might drip.
3. Remove the valve: The PCV valve might be held in place by a simple press-fit. You may be able to pull it out by hand, or you might need to use a small pair of pliers to gently pry it out. Be careful not to damage the valve cover.
4. Install the new valve: Insert the new PCV valve into the hole, making sure it sits flush.
5. Reconnect the hoses: Attach the hoses back to the new PCV valve.
6. Check for leaks: After reconnecting everything, visually inspect the connections to ensure there are no leaks.
Important Considerations:
* Engine Type: Knowing your specific engine type (e.g., 5.7L TBI) will help you find more precise diagrams and instructions online. Check your vehicle's documentation or the engine block itself for this information.
* Tools: You might need a small flat-head screwdriver or pliers, and some rags or shop towels.
* Safety: Always work on your vehicle in a well-ventilated area. Wear appropriate safety glasses and gloves.
* Visual aids: Searching YouTube for "1994 Chevy K1500 PCV valve replacement" will likely yield several helpful videos demonstrating the process for your specific engine. These videos are often more effective than written instructions.
If you're uncomfortable performing this repair yourself, it's best to take your truck to a qualified mechanic. It's a relatively simple job, but improperly installed PCV valves can cause other engine issues.
