To properly time the engine of a Mazda 2 Demio, you will need to follow a specific procedure. Here are the general steps to time the engine manually:

1. Park the vehicle in a well-ventilated area and make sure the engine is off.

2. Open the hood and locate the timing marks on the crankshaft pulley and the timing cover. The timing cover is a protective casing on the front of the engine.

3. Remove any obstructions, such as belts or covers, that might hinder access to the timing components. Ensure you have a clear view of the timing marks.

4. Locate the timing mark on the camshaft sprocket. This mark is typically a small notch or line that aligns with a reference point on the cylinder head.

5. Use a wrench or socket to manually rotate the crankshaft pulley in a clockwise direction. Gradually rotate the crankshaft until the timing marks on the crankshaft pulley and the timing cover align at the specified timing mark for your specific Mazda 2 Demio model. Consult your vehicle's manual or a reliable online source to determine the precise timing mark location.

6. Once the crankshaft timing mark is aligned, check the alignment of the camshaft timing mark. The camshaft timing mark should also align with the reference point on the cylinder head.

7. If the camshaft timing mark is not aligned, use a wrench to rotate the camshaft until the timing mark is properly aligned.

8. After aligning the timing marks, check the position of any other components involved in the timing system, such as the timing belt or chain tensioner. Ensure they are properly installed and tensioned according to the manufacturer's specifications.

9. Once you are confident that all timing components are properly aligned and installed, you can proceed to reassemble any parts you previously removed.

It's important to note that these steps are a general guideline. For a more accurate and detailed procedure, it's always recommended to consult your vehicle's manual or seek guidance from a qualified automotive professional.