Rattling and squealing noise

LEGENDARY0101

MEMBER
2011 BMW X3
3.0L
6 CYL
TURBO
4WD
AUTOMATIC
165,000 MILES

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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Friday, October 18th, 2019 AT 2:39 PM

1 Reply

STEVE W.

MECHANIC
13,573 POSTS

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