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10-17-2019, 12:39 PM | #1 |
Enlisted Member
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Metallic Grinding/Rattling Noise Under Throttle
Over the last few weeks, I noticed that on cold start, once I drive off, increasing RPMs makes a gradual metallic noise in the undercarriage/rear area of my 135is.
I originally thought it was just a rock chip, but that doesn't seem to be the case. Has anyone encountered this noise before? It tends to go away/not be as prominent after driving for a few minutes. No noise at idle or revving the engine in neutral. I'm guessing something is loose and rattling? |
10-17-2019, 04:54 PM | #2 |
First Lieutenant
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Drives: bmw 135is
Join Date: Apr 2019
Location: nor cal
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Metalic grinding sounds are NEVER a good sound
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10-31-2019, 11:05 AM | #3 |
First Lieutenant
73
Rep 341
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turbo rattle?
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Metallic Black on Black 2009 135i, new waterpump, OFHGs, and VC gasket...RB turbo PCV valve (ooo), NGK performance plugs...V3Cobb access port stage 2+FMIC, Injen intake, Mishimoto clone FMIC, ARM charge pipe, ARM downpipes, Whiteline subframe bushings
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