Which technician recommends backward flushing an oil cooler after repairing an engine with damaged bearings?

Backward flushing an oil cooler is a critical procedure after repairing an engine with damaged bearings because it helps to remove any debris or contaminants that may have been released during the repair process or generated by the bearing wear. This process works by forcing cleaning fluid in the opposite direction through the cooler, ensuring that any particles trapped within the oil cooler's internal passages are effectively dislodged and eliminated.

Technician A's recommendation of backward flushing emphasizes the importance of maintaining the cleanliness of the oil lubrication system, which is vital for the longevity and proper functioning of the repaired engine. Any remnants of debris left in the oil cooler could potentially circulate back into the engine, leading to further damage or compromised performance.

In contrast, if the other technician does not recognize the necessity of this procedure, it highlights a gap in their understanding of engine repair best practices. Therefore, A's proactive approach to preventing future issues by advocating for backward flushing shows a thorough comprehension of the critical maintenance steps that follow engine repairs involving damaged components.