Worn piston rings are known to cause ____________.

Worn piston rings have a significant impact on engine performance, leading to several issues. The primary consequence of worn piston rings is excessive blow-by. This condition occurs when combustion gases escape past the piston rings into the crankcase, indicating that the seal between the piston and cylinder wall is compromised. This not only reduces the effectiveness of combustion but can also cause oil contamination and loss of engine efficiency.

Furthermore, worn piston rings lead to low power output. As the engine struggles to maintain proper compression and combustion, it cannot generate the power required for optimal performance. Low power often results from a combination of factors, including fuel not igniting as efficiently due to the excessive blow-by.

Additionally, a loss of compression is directly related to worn piston rings. The rings are designed to create a tight seal within the combustion chamber. When they wear down, the seal fails, leading to a reduction in compression pressure that is essential for effective engine operation. Low compression affects engine starting, idling, and overall function.

Therefore, since worn piston rings contribute to excessive blow-by, low power, and loss of compression, the correct answer is that they are known to cause all of the above issues. Understanding this connection helps in diagnosing engine problems and recognizing the importance of maintaining piston