1. Remove the cylinder head by loosening the four cylinder head bolts. Note: The order in which you loosen the bolts is important to avoid warping the cylinder head (refer to the service manual).
2. Once the cylinder head bolts are removed, carefully lift off the cylinder head. You will need to remove any sealant or gasket material from the cylinder head and block.
3. The next step is to remove the piston and connecting rod from the cylinder. It would be best if you loosened the connecting rod nuts using a box-end wrench. Use a piston pin puller to remove the piston from the connecting rod.
4. Once the piston and connecting rod are removed, you can clean and inspect the cylinder bore for scratches, scoring or damage. You should consult a qualified mechanic if there is any damage to the cylinder bore.
5. If the cylinder bore is in good condition, you can install a new piston and rings. Always follow the manufacturer's instructions for installing piston rings and make sure the ring gaps are positioned correctly.
6. Next, install a new cylinder head gasket and set it on the engine. Install the cylinder head bolts and tighten evenly following the sequence and torque specs recommended by the service manual.
7. Once the cylinder head is installed, reinstall the valve cover and other components you disassembled during disassembly.
8. Finally, check for any leaks once you've reassembled everything. Start the engine and let it run for a few minutes to warm up. After that, perform necessary adjustments (e.g., valve clearances, idle speed, etc.).
If you have doubts about any of the above, we recommend consulting a qualified mechanic or refer to a shop manual.
