1. Preparation:
* Disconnect the Battery: This prevents accidental shorts.
* Remove the Valve Covers: Provides access to the camshaft.
* Remove the Timing Chain or Belt: This is crucial. Consult a service manual specific to your engine for the proper procedure. Take pictures or make notes as you go.
* Remove the Timing Gear (if applicable): This depends on whether you have a chain or gear drive.
* Remove the Rocker Arms and Pushrods: Carefully remove and set aside in an organized manner. Keep track of their positions if possible.
* Remove the Lifters: These should come out fairly easily once the pushrods are removed. Again, organize them if possible.
2. Freeing the Camshaft:
This is where the difficulty often lies. A stuck camshaft is usually due to corrosion, rust, or simply being stubbornly tight.
* Penetrating Oil: Liberally apply a high-quality penetrating oil (like PB Blaster or Kroil) to the camshaft journals (the parts that rotate within the block). Let it soak for several hours, or even overnight. Reapply periodically. Heat can help the penetrating oil work better.
* Heat: A propane torch applied carefully to the block around the camshaft bearings can help expand the metal, making it easier to remove the camshaft. Be extremely careful not to overheat the block or damage any components. This is a delicate process and should only be done by someone experienced.
* Gentle Persuasion: Use a camshaft removal tool if possible. These tools usually clamp onto the camshaft lobes and provide leverage. Apply even, steady pressure. Avoid using excessive force, as you could damage the camshaft or the block. A gentle rocking motion is often effective.
* Impact: As a last resort, you might consider using a brass or nylon mallet to gently tap the camshaft from one end. However, this carries a risk of damaging the camshaft or block. Only attempt this if other methods have failed.
3. Removal:
Once the camshaft is loose, carefully slide it out of the block.
Important Considerations:
* Service Manual: A factory service manual for your specific year and model 350 Chevy engine is invaluable. It provides detailed instructions and torque specifications.
* Tools: Invest in good quality camshaft removal tools. Improvised tools can damage your engine.
* Patience: Removing a stuck camshaft can be time-consuming. Don't rush the process.
* Professional Help: If you're not comfortable with this process, consider taking your engine to a qualified mechanic. The cost of professional repair may be less than the damage caused by attempting this yourself if you lack the experience.
Disclaimer: This information is for general guidance only. Engine repair can be complex and potentially dangerous. Always prioritize safety and consult a professional if you are unsure about any step. Improper procedures can cause significant damage to your engine.
