What should I do if the cylinder head screw of Buick Excelle is loose?

Stop, check, tighten, replace the screws and check the cylinder head.

1. Stop: If the cylinder head screw is found to be loose, immediately stop and shut down the engine to avoid further damage.

2. Inspection: Open the hood of the car, check whether the screws of the cylinder head are loose or fall off, and check whether the cylinder head is cracked or otherwise damaged.

3. Tightening: If the screw is found to be loose, use the correct wrench to tighten it.

4. Replace the screw: If the screw is damaged or cannot be tightened, please replace it with a new one immediately. Screws with the same specifications and materials as the original screws must be used to ensure safety and reliability.

5. Check the cylinder head: If cracks or other damages are found in the cylinder head, you should go to the regular maintenance station for inspection and maintenance in time to avoid further damage to the engine.