Stripping a four cylinder engine

First we removed the cam belt and made sure that the engine was timed. We then un bolted the rocket cover using a 10mm socket a ratchet after we removed this we then removed the Top Dead Centre bolts in a special sequence the reason we did this is because we will be preventing any damage to the valves and cylinders. After we did this we removed the cylinder and I then I used this special tool called the valve spring compressor to compress the springs and release the valves.