Here's a general overview. This is not a substitute for a factory service manual specific to your vehicle. Always consult that manual for the exact specifications, torque values, and procedures.
Tools You'll Need:
* Factory service manual: Absolutely essential.
* Valve adjustment tools: Specifically designed for this engine. These usually include feeler gauges of various thicknesses.
* Socket set and wrenches: Various sizes will be needed for removing and reinstalling components.
* Torque wrench: Crucial for tightening bolts to the correct specification, preventing damage.
* Jack and jack stands: To safely lift and support the vehicle.
* Wheel chocks: For added safety.
* Clean rags: To keep the engine clean.
* Pen and paper: To record your measurements.
General Procedure (Consult your service manual for specifics):
1. Safety First: Disconnect the negative battery terminal. Support the vehicle securely on jack stands.
2. Access the Valves: You'll need to remove components like the valve cover to access the rocker arms and valve adjustments. This often involves removing various parts, potentially including the air intake system, parts of the fuel injection system, and other components. Your service manual will detail exactly what to remove.
3. Locate Top Dead Center (TDC): This is critical for accurate valve adjustment. Use the crankshaft pulley and timing marks to locate the TDC for the appropriate cylinder (your service manual will explain how to determine which cylinder is at TDC for each valve adjustment).
4. Measure Valve Lash (Clearance): Use feeler gauges to measure the clearance between the rocker arm and the valve stem. Your service manual will specify the correct clearance (lash) in millimeters or thousandths of an inch for both intake and exhaust valves.
5. Adjust Valve Lash: Most 2.2L Cavaliers use shims under the rocker arms for valve adjustment. This means you'll need to remove the rocker arms, remove the incorrect shims, and install the correct size shims to achieve the specified clearance. The service manual will have a shim size chart. Double-check all measurements carefully before reinstalling.
6. Reassemble: Carefully reinstall all removed components, ensuring everything is properly seated and torqued to the manufacturer's specifications.
7. Recheck: After reassembly, it's a good idea to re-check the valve lash to ensure everything is correct.
8. Start the Engine: Listen for any unusual noises.
Important Considerations:
* Shim Selection: The process of selecting the correct shims can be tricky and may require multiple attempts to get the clearances correct.
* Torque Specifications: Always use a torque wrench and follow the torque specifications precisely. Over-tightening can damage the engine.
* Cylinder Order: The firing order of the cylinders is crucial for knowing which valve to adjust when. Your service manual will show the correct sequence.
Again, this is a general overview. You absolutely MUST consult a factory service manual for your specific 2001 Chevy Cavalier 2.2L engine. The details can vary significantly, and incorrect procedures can lead to serious engine damage. If you're unsure about any part of this process, take your car to a qualified mechanic.
