Performance Related:
* Loss of power: This is a major indicator. You'll feel a significant drop in acceleration, especially in the mid-range where the turbo typically provides boost.
* Hesitation or lag: The turbo might spool up slower than usual, or there might be a noticeable delay before boost kicks in.
* Smoke from the exhaust: This is a critical sign. The color of the smoke can provide clues:
* Blue smoke: Indicates burning oil, often a sign of internal turbo damage.
* White smoke: Can indicate a head gasket issue or coolant leak *into* the engine, which *could* be related to a turbo failure if coolant is being drawn into the turbo.
* Black smoke: Usually signifies a rich fuel mixture, but *could* be a secondary symptom if the turbo's malfunction is affecting air/fuel ratios.
* Unusual noises: Listen for:
* Whistling or hissing sounds: Could indicate a leak in the turbocharger system.
* Grinding or scraping noises: Suggests internal damage to the turbo's bearings or compressor wheel.
* High-pitched whine or squeal: Can be a sign of bearing failure.
Other Indicators:
* Oil leaks: Look for oil leaks around the turbocharger itself or in the surrounding areas.
* Check engine light: The car's onboard diagnostics system might detect a problem and illuminate the check engine light. You'll need a scan tool to read the codes to determine the specific issue.
* Reduced fuel economy: A malfunctioning turbo can impact engine efficiency, leading to lower fuel economy.
* Boost gauge reading (if equipped): A significantly lower boost pressure reading than expected indicates a problem.
Important Note: Some of these symptoms can be caused by other issues, not just a blown turbo. It's crucial to have a mechanic diagnose the problem properly to determine the root cause. Ignoring a potentially blown turbo can lead to catastrophic engine damage.
