how to change timing belt engine G4JS & Hyundai H-1

The process for changing a timing belt on a G4JS engine can be quite involved, so I'll provide a general overview of the steps involved. However, please note that this is not a comprehensive guide and you should refer to the service manual for your specific vehicle for detailed instructions.
1. Prepare the engine: Before beginning any work, make sure the engine is in the correct position. This typically involves aligning timing marks on the camshaft and crankshaft sprockets.
2. Remove engine components: Depending on the vehicle, you may need to remove the serpentine belt, alternator, power steering pump, and other components to access the timing belt cover.
3. Remove the timing belt cover: The timing belt cover is typically held in place by bolts. Remove the bolts and carefully pry the cover off.
4. Remove the old timing belt: Loosen the tensioner pulley and remove the old timing belt.
5. Install the new timing belt: Install the new timing belt, making sure to keep it tight and properly aligned with the camshaft and crankshaft sprockets.
6. Tension the new timing belt: Use a tensioner tool to properly tension the new timing belt. Refer to the service manual for your specific vehicle for the correct tension specification.
7. Reinstall engine components: Reinstall any components that were removed to access the timing belt cover.
8. Verify timing: Verify that the timing marks on the camshaft and crankshaft sprockets are still properly aligned. Start the engine and check for any unusual noises or vibrations.
Again, please note that this is just a general overview of the process for changing a timing belt on a G4JS engine. It's important to refer to the service manual for your specific vehicle for detailed instructions and to ensure that the job is done correctly.