What does a high-pitched squealing sound from the engine bay when accelerating signify?
Answer and explanation
Correct answer: C. A loose or worn auxiliary alternator drive belt slipping on pulleys
- Step 1: Engine squeal diagnosis. Step 2. High-pitched screeching that changes with engine revs is a slipping alternator/fan serpentine belt. Answer: A loose or worn auxiliary alternator drive belt slipping on pulleys. Why not the others: Head gasket produces hissing/chuffing; brake squeal occurs while braking, not accelerating; AC gas leak is odorless or hissing.
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