Clattering noise from the top of the engine during inspection of the rocker arm geometry indicates that the rocker arm is contacting the tip of the valve stem excessively to one side.

Technician A says that pushrod length may be changed to correct the problem.

Technician B says that rocker arm length may be changed to correct the problem.

Who is correct?

Question

05-12-2024
Engineering

College

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Clattering noise from the top of the engine during inspection of the rocker arm geometry indicates that the rocker arm is contacting the tip of the valve stem excessively to one side.

Technician A says that pushrod length may be changed to correct the problem.

Technician B says that rocker arm length may be changed to correct the problem.

Who is correct?

Answer :

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TomSmith675 TomSmith675 · Answer 1 · 2024-08-06T05:06:24-04:00

Final answer:

Both Technician A and Technician B propose potential solutions to correct the excessive contact between the rocker arm and valve stem. The pushrod length and rocker arm length can be adjusted to address the issue.

Explanation:

The clattering noise and excessive contact between the rocker arm and valve stem indicate a problem with the rocker arm geometry in the engine. Both Technician A and Technician B suggest possible solutions to correct the problem.

Technician A suggests changing the pushrod length as a potential solution. The pushrod is responsible for transmitting the motion from the camshaft to the rocker arm. Adjusting its length can affect the valve lift and timing, potentially resolving the issue.

Technician B proposes changing the rocker arm length. The rocker arm determines the relationship between the camshaft lobe and valve stem. Altering its length can alter the valve lift and timing, which may help rectify the problem.

Ultimately, it would depend on the specific engine and its design, as well as the severity of the issue, to determine which approach is the most suitable. Consulting the engine manufacturer's guidelines or seeking advice from an experienced mechanic would be the best course of action.