It is not easy to change it first. Hang the timing chain on the intake and exhaust camshaft and align the timing mark on the intake camshaft with the blue link of the timing chain. The specific operation steps are as follows:

1. First hang the timing chain on the intake and exhaust camshafts.

2. Align the timing mark on the intake camshaft with the blue link of the timing chain.

3. Align the timing mark on the exhaust camshaft with the blue link of the timing chain.

4. Install the tensioning arm of the timing chain.

5. Install the chain top of the timing chain, and the operation is completed.