What should be done if valve clearance exceeds specifications?

When valve clearance exceeds specifications, it is crucial to accurately identify the underlying cause of this condition. Determining whether the valve stem or the valve guide is responsible for the excessive clearance is essential for effective maintenance and repair. Excessive clearance can lead to poor engine performance, increased wear, and potential damage if left unaddressed.

By assessing the components involved, you can either choose to replace the valve stem or the valve guide, or make necessary adjustments, rather than performing a generic fix. This targeted approach allows for a more efficient resolution to the problem and can ultimately extend the life of the engine components.

In contrast, simply adjusting the rocker arms might not resolve the root cause of the issue, as this could be a symptom of wear in the valve stem or guide. Replacing the valve guide preemptively without diagnosis can lead to unnecessary repairs and expenses. Ignoring the issue altogether is not advisable, as it can lead to more severe engine problems in the long run. Therefore, identifying the specific cause of excessive clearance is the most effective and responsible course of action.