Which statement about CV boots is true?

Which statement about CV boots is true?

• A. The most common CV joint failure is torn or split boots.
• B. Boot tears have no effect on CV joint life.
• C. Boot tears always lead to immediate CV joint failure.
• D. Boot tears do not exist.

Answer: (A)

When a CV boot is intact, it seals grease inside the joint and keeps dirt out. A torn or split boot breaks that seal, allowing lubricant to leak and contaminants to enter. Without sufficient lubrication and with abrasive debris inside, the joint wears quickly, which can cause symptoms like clicking, vibration, or loss of smooth operation and eventually leads to failure. Because boot damage is the common starting point that leads to CV joint wear and failure, the statement that torn or split boots are the most frequent cause of CV joint failure is true. Boot tears do affect CV joint life—they accelerate wear and aren’t harmless. They don’t always cause immediate failure, since a small tear might function for a time before problems become noticeable. And boot tears obviously exist.

When a CV boot is intact, it seals grease inside the joint and keeps dirt out. A torn or split boot breaks that seal, allowing lubricant to leak and contaminants to enter. Without sufficient lubrication and with abrasive debris inside, the joint wears quickly, which can cause symptoms like clicking, vibration, or loss of smooth operation and eventually leads to failure. Because boot damage is the common starting point that leads to CV joint wear and failure, the statement that torn or split boots are the most frequent cause of CV joint failure is true.

Boot tears do affect CV joint life—they accelerate wear and aren’t harmless. They don’t always cause immediate failure, since a small tear might function for a time before problems become noticeable. And boot tears obviously exist.