Who is correct about the method to measure liner protrusion?

To determine the correct method for measuring liner protrusion, it's essential to understand what liner protrusion is and how it is typically measured. Liner protrusion refers to the distance that the cylinder liner extends above the engine block face. This measurement is critical to ensure proper sealing and engine performance.

Technician B's method, which is identified as correct, likely involves a reliable and standardized procedure that might include the use of precision measuring tools like a depth gauge or a straight edge alongside a feeler gauge to accurately measure the height of the liner relative to the block surface. This approach would provide a clear and precise measurement necessary for the technician to assess if the protrusion is within the manufacturer's specified tolerances, which is crucial for maintaining engine efficiency and avoiding issues such as cylinder head gasket failure.

To avoid confusion, it’s important to contrast this with other potential methods (which may be followed by Technician A) that could be less accurate or not aligned with industry best practices. These practices may lack the necessary precision tools or techniques, potentially leading to incorrect assessments of liner protrusion. Thus, emphasizing the correct methodology ensures the longevity and performance of the diesel engine.