How to adjust the valve clearance of Buick Regal? Do you need to adjust?

Matters needing attention in valve clearance inspection and adjustment:

According to the specific requirements and regulations of automobile manufacturers on valve clearance adjustment.

Pay attention to the influence of temperature: the temperature of valve rocker arm and valve stem will affect the valve clearance. Generally speaking, the valve clearance adjustment is smaller when the engine is hot than when it is cold. Some cars need to be adjusted when the engine is cold, and some cars can be adjusted when the engine is hot or cold, but the clearance value is different.

The valve lash of each cylinder should be adjusted consistently to avoid unbalanced engine operation during operation.

When adjusting the valve clearance, the adjusted valve should be completely closed, and then the adjusted clearance value is accurate.

Pay attention to check the working face of rocker head before adjustment. When the engine is working, the arc-shaped working surface of the rocker arm head constantly collides and rubs with the end of the valve stem, especially in the case of poor lubrication, which will cause wear and tear out of the pit, and in serious cases, the end of the valve stem will get stuck in the pit, which will break the rocker arm. Therefore, it should be repaired or replaced with a new one according to the wear condition, so as not to affect the accuracy of its adjustment.