Using this timing belt guide is easy. First, make sure your engine is turned off and cooled down. Remove the old OEM timing belt guide. Then, take the new IAG guide from the box and use the included zinc - coated socket cap screws and washers to install it in place. Adjust the guide according to the thickness of your timing belt. This will help ensure proper clearance and smooth operation. When it comes to maintenance, regularly check the guide for any signs of wear or damage. Keep it clean and dry. If you notice any issues, such as excessive wear on the belt or the guide itself, it might be time to replace it. Also, always follow the manufacturer's instructions for your specific Subaru model.