What is the recommended replacement interval for most timing belts on late-model OHC engines?

The recommended replacement interval for most timing belts on late-model overhead cam (OHC) engines is every 100,000 miles. This recommendation is based on the durability and engineering improvements that have been made in timing belt materials and designs. Manufacturers have performed extensive testing and have determined that, under typical driving conditions, a timing belt can last around this mileage before it becomes prone to failure due to wear and tear.

Replacing the timing belt at this interval helps to prevent potential engine damage that can occur if the belt were to break while the engine is running. A failure can lead to serious internal engine damage, particularly in OHC engines where the pistons and valves operate in close proximity. Regular maintenance and adherence to the recommended replacement schedule are crucial for the reliability and longevity of the engine.