BYD s7 timing chain carries out video recording according to the following methods.

1. Align the crankshaft according to the marks on the crankshaft timing pulley. Generally, the piston top dead center position of 1 cylinder is required.

2. Install marks on the camshaft timing pulley to align the camshaft, and align the positions of the two camshafts of dual camshafts respectively.

3. Install the timing belt/chain.