A seized turbocharger is caused by boost pressure leaks.

A seized turbocharger is caused by boost pressure leaks.

• A. True
• B. False
• C. Not sure
• D. N/A

Answer: (B)

A seized turbo is caused by lubrication or heat-related failures, not by boost pressure leaks. The turbo’s shaft depends on a steady oil supply for lubrication; if oil is starved, contaminated, or the oil feed is blocked, bearings overheat and seize. A boost leak simply prevents the system from building or maintaining intended boost by letting charged air escape; it doesn’t bind the shaft or seize the bearing. In some cases, a leak can cause the turbo to work harder and run hotter, potentially contributing to failure over time, but the direct cause of a seizure is oil/thermal failure. Therefore, the statement is false.

A seized turbo is caused by lubrication or heat-related failures, not by boost pressure leaks. The turbo’s shaft depends on a steady oil supply for lubrication; if oil is starved, contaminated, or the oil feed is blocked, bearings overheat and seize. A boost leak simply prevents the system from building or maintaining intended boost by letting charged air escape; it doesn’t bind the shaft or seize the bearing. In some cases, a leak can cause the turbo to work harder and run hotter, potentially contributing to failure over time, but the direct cause of a seizure is oil/thermal failure. Therefore, the statement is false.