In a leakdown test, what would a higher percentage of leakage generally indicate?

A higher percentage of leakage in a leakdown test generally indicates possible internal engine issues. This test is designed to measure the amount of air that leaks out of the engine's cylinders when they are pressurized. A high leakage percentage suggests that there could be problems such as worn piston rings, damaged valves, or even issues with the gaskets.

These factors compromise the engine's ability to maintain proper compression, which is essential for effective combustion. When there is increased leakage, it can lead to a loss of power, poor performance, and ultimately more extensive engine problems if not addressed. Therefore, recognizing a high leakage percentage is an important indicator of potential internal engine troubles that require further diagnostic investigation and repair.