Replace a caliper when its bore damage is in excess of ______?

The correct response indicates that a caliper should be replaced when its bore damage exceeds .001 inches. This threshold is significant because even a small amount of bore damage can lead to significant issues in the braking system. A damaged caliper bore can impair the proper function of the caliper, leading to uneven brake pad wear, reduced braking efficiency, and potential brake failure.

In automotive practices, maintaining precise measurements in braking components is critical for safety. Therefore, setting the replacement limit at .001 inches ensures that any wear or damage is appropriately addressed before it can compromise the braking system's integrity.