Which technician correctly states that failing to remove a ring ridge can damage a new piston?

The assertion that failing to remove a ring ridge can damage a new piston is significant in engine repair. A ring ridge occurs at the top of the cylinder where the piston rings typically do not make contact during normal operation, leading to an accumulation of carbon deposits. If this ridge is not removed when installing a new piston, it can lead to a situation where the new piston does not seat properly or is subjected to unnecessary stress during operation.

When a new piston is forced past an unremoved ring ridge, it may cause the piston to become scratched or gouged, leading to premature wear, reduced efficiency, and eventual failure of the piston. Moreover, the ring ridge can compromise the sealing effectiveness of the piston rings, which may lead to increased blow-by, loss of compression, and oil consumption problems. Addressing the ring ridge before installing a new piston ensures that the cylinder wall is smooth and allows the piston to operate correctly.

Both technicians' statements reflect an understanding of the potential consequences of neglecting to remove a ring ridge. Thus, the correct answer indicates that both technicians are aligned in their assessment, highlighting the importance of this crucial step during engine rebuilds or repairs.