1. Preparation:
* Safety First: Disconnect the battery negative terminal. Wear safety glasses and gloves. Work in a clean, well-lit area.
* Gather Tools: You'll need a variety of tools including sockets, wrenches (both metric and standard), a camshaft installation tool (often a specific lifter retainer tool and possibly a camshaft installation tool to prevent damage), a torque wrench, and possibly a pry bar (use cautiously). A shop press can make things easier, but is not strictly necessary.
* Drain Fluids: Drain the engine oil completely.
* Remove Valve Covers: Access to the valve train is necessary.
* Remove Rocker Arms and Pushrods: Carefully remove the rocker arms and pushrods, keeping them organized to ensure they go back in the same locations. A magnetic parts tray is highly recommended.
* Remove Timing Chain Cover (or Gears): This exposes the timing chain and the camshaft sprocket. Take note of the timing chain's position relative to the crankshaft and camshaft sprockets if you're not replacing the timing chain. You'll need to reassemble in exactly the same way.
2. Removing the Camshaft:
* Remove Timing Chain/Gears: Carefully remove the timing chain or gears. If reusing, mark their positions for reassembly.
* Remove Cam Sprocket: Remove the camshaft sprocket using the appropriate socket and wrench.
* Remove the Camshaft: This is the trickiest part. The camshaft is held in place by the lifters.
* The Lifters: The lifters are crucial. They must be fully removed before attempting to remove the cam. You will most likely need to use a lifter retainer tool to compress the lifters enough so that the cam can be pulled out. Improper removal here can damage the lifters, cam, or block.
* Gentle Persuasion: Once the lifters are removed, gently rock the camshaft back and forth to break it loose. Some engines may have a slight taper to help with removal. Use the camshaft installation tool if available, and absolutely avoid using a pry bar directly on the camshaft lobes. A little pressure may be needed, but excessive force could damage the camshaft bearing surfaces or the block.
3. Post-Removal:
* Inspect the Camshaft: Check for any wear, damage, or scoring on the camshaft lobes, journals, and thrust faces.
* Clean the Engine Block: Clean any debris from the camshaft bores.
Important Considerations:
* Engine Stand: An engine stand is highly recommended, especially for a novice. It makes working on the engine significantly easier and safer.
* Repair Manual: A factory or aftermarket service manual is indispensable. It will provide specific torque specifications, procedures, and diagrams for your exact engine.
* Professional Help: If you are not comfortable with engine repair, it's always best to seek professional help. Improper disassembly or reassembly can cause significant damage to your engine.
This is a simplified overview. The process can vary slightly depending on the specific year and model of your 327 Chevy. Always consult a reputable repair manual for detailed instructions specific to your engine. Taking your time, being methodical, and using the proper tools are crucial to a successful camshaft removal and installation.
