Which is larger, the intake valve or the exhaust valve?

[KathrynRose]

Exhaust valve clearance is larger than intake valve clearance. This is because a larger exhaust valve clearance facilitates better expulsion of combustion exhaust gases, hence it is set larger than the intake valve clearance. Below are the relevant details: Standard clearance for intake and exhaust valves: The clearance for intake valves typically ranges between 0.20mm and 0.25mm. In contrast, the clearance for exhaust valves is naturally larger due to thermal expansion, generally ranging between 0.29mm and 0.35mm. Valve clearance inspection and adjustment: Valve clearances for all cylinders should be adjusted uniformly to prevent engine imbalance during operation. Adjustments must be made in accordance with the specific requirements and regulations set by the vehicle manufacturer.