What measurement technique can improve accuracy when checking bore dimensions?

Utilizing an inside micrometer or bore gauge is the most effective technique for accurately checking bore dimensions. Inside micrometers and bore gauges are specifically designed to measure the internal diameter of cylindrical objects with a high degree of precision. They provide a more accurate reading by allowing for precise adjustments and measurements directly at the bore, compensating for any variations in the bore size. This ensures that you are measuring the actual dimensions of the bore rather than relying on indirect methods that can introduce errors.

Other methods, such as using a standard tape measure or a depth gauge, are not suitable for internal diameter measurements. A tape measure is designed for external dimensions and lacks the necessary precision for small engine components. A depth gauge, while useful for other measurement types, does not provide the required capability for accurately assessing internal bore sizes. Visual inspection alone is insufficient for measuring bore dimensions, as it does not offer the accuracy needed to determine if the bore is within specifications.