What types of leaks typically concern a smog check inspector during an inspection?

During a smog check inspection, a significant focus is placed on oil and coolant leaks due to their potential impact on vehicle emissions and overall environmental compliance. Oil leaks can lead to burning oil, which might contribute to increased hydrocarbon emissions. Coolant leaks could indicate problems with the engine that may affect its performance and emissions. Both types of leaks can signal underlying issues that might compromise the engine's ability to operate efficiently, making them a key concern for inspectors who aim to ensure that vehicles meet smog regulations.

Fuel leaks, air leaks, and water leaks, while potentially problematic, do not directly relate to the same emission concerns in the same manner as oil and coolant leaks. This differentiation highlights why oil and coolant leaks are prioritized during smog inspections.