This is a *highly summarized* overview. Detailed instructions require a repair manual specific to your Cavalier's engine (likely a 2.2L or 2.4L). Improper procedures can cause serious engine damage.
General Steps (Do NOT use this as a sole guide):
1. Preparation:
* Safety First: Disconnect the negative battery terminal.
* Gather Tools and Parts: You'll need a complete head gasket kit (including gasket, head bolts, possibly new head studs), torque wrench, socket set, various wrenches, jack stands, engine hoist (highly recommended), coolant drain pan, cleaning supplies, and a repair manual.
* Consult the Repair Manual: This is crucial. It provides torque specifications, component locations, and proper disassembly/assembly procedures.
2. Disassembly:
* Drain Coolant and Oil: Completely drain the engine's coolant and oil.
* Disconnect Components: Disconnect various components attached to the cylinder head: intake manifold, exhaust manifold, spark plugs, wires, sensors, etc. The repair manual will detail this.
* Remove Timing Belt/Chain: This is essential to prevent damage and is often a complex process itself.
* Remove the Cylinder Head: This typically involves removing the rocker arms, valve covers, and then carefully unbolting the cylinder head using the correct sequence and torque. An engine hoist is almost necessary here.
3. Inspection and Cleaning:
* Inspect the Cylinder Head: Check for cracks, warping, or damage. A warped head needs to be machined or replaced.
* Inspect the Cylinder Block: Check for cracks or damage.
* Clean Surfaces: Thoroughly clean the cylinder head and cylinder block mating surfaces. Any debris will prevent a proper seal.
4. Assembly:
* Install Head Gasket: Install the new head gasket carefully, ensuring it's correctly positioned.
* Install the Cylinder Head: Carefully lower the cylinder head onto the block, ensuring it sits evenly.
* Tighten Head Bolts/Studs: This is CRITICAL. Tighten the head bolts/studs in the sequence and to the torque specifications specified in your repair manual. Using the wrong torque can warp the head or crack the block. A torque wrench is absolutely essential.
* Reinstall Components: Reinstall all components removed earlier in reverse order, referring to your repair manual.
5. Refilling and Testing:
* Refill Coolant and Oil: Refill the coolant and oil to the proper levels.
* Check for Leaks: Carefully check for leaks around the head gasket, intake manifold, and other areas.
* Run the Engine: Let the engine run for a short period, monitoring for leaks and unusual sounds.
* Pressure Test (Recommended): A coolant pressure test is highly recommended to ensure the head gasket is sealing properly.
Important Considerations:
* Engine Timing: Improperly reinstalling the timing belt/chain can cause catastrophic engine damage.
* Torque Specifications: Incorrect torque will cause problems. Use a torque wrench and follow the manual's specifications precisely.
* Cleanliness: Keep everything meticulously clean to prevent debris from interfering with the seal.
* Repair Manual: A specific repair manual for your 1999 Chevy Cavalier is indispensable.
Again, this is a simplified overview and should not be used as a sole guide for performing this repair. Improperly performing this repair can result in serious engine damage, costing significantly more than professional repair. If you lack the experience and tools, it's best to consult a qualified mechanic.
