Rattling and squealing noise

2011 BMW X3
165,000 MILES • 3.0L • 6 CYL • TURBO • 4WD • AUTOMATIC
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LEGENDARY0101
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My car listed above (35i) was making a squealing noise. now it is making a clicking or tapping sound coming from the engine. No codes or engine light has come on. Please help!. Sometimes the spark add says a negative number.
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Oct 18, 2019 at 2:39 PM
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STEVE W.
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Welcome to 2CarPros. That description sounds like internal part damage. The squeal would be something like a bearing or a lifter as the parts grind together. Either one can cause a rattle and wouldn't set a code unless it causes a problem in a monitored system. The easiest way to find the location would be to use a mechanics stethoscope and listen to the various locations to hear the sound. From there it would require taking the engine apart to determine exactly what parts are the issue
Oct 18, 2019 at 6:26 PM