Timing Belt Tension Gauge Tool

To be honest, I have never used a timing belt tension-setting tool. I just put as much tension as I can with one finger. This is sufficient tension to keep the belt from slipping, and is definitely not too much to the point which excess wear would occur. Timing belts don’t stretch like accessory belts, which is why many engines were designed with tensioners which rotate into place, and once the tension is set, there is no spring or other device to add or remove tension.