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A noisy valve train is being diagnosed.

Technician A says that the rocker arm may be adjusted too tightly.

Technician B says that the rocker arm may be adjusted too loosely or may be worn.

Which technician is correct?

Answer :

Both Technician A and Technician B provide plausible explanations for a noisy valve train. Therefore, both Technician A and Technician B could be correct in diagnosing the issue.

Technician A suggests that the rocker arm may be adjusted too tightly. If the rocker arm is adjusted too tightly, it can cause excessive pressure and friction, leading to noise in the valve train. This is a valid possibility for the source of the noise.

Technician B suggests two possibilities: the rocker arm may be adjusted too loosely or may be worn. If the rocker arm is adjusted too loosely, it may not be able to maintain proper contact with the valve, resulting in noise. Similarly, if the rocker arm is worn out, it can cause abnormal movement and noise in the valve train.

Therefore, both explanations are plausible and can result in a noisy valve train. It would be necessary to further inspect the rocker arm and the valve train to determine the precise cause of the noise.

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