Grinding/knocking noise

2008 NISSAN ALTIMA
119,000 MILES • 4 CYL • 2WD • AUTOMATIC
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HSMCBRIDE
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My car all of a sudden started making a very loud grinding sound when I accelerate but it does not do it every time. When it makes the noise it last only about ten seconds or so then stops. If i let off the gas pedal the sound immediately stops. I took it to a mechanic who said it sounded like brakes and changed them out. He said he never heard the noise I was talking about. I picked the car up and of course it is still making the same terrible sound. I am taking it back to him but would like some idea of what to tell him to check this time. Any ideas?
Feb 15, 2018 at 8:27 AM
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ASEMASTER6371
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Good afternoon.

Have him check the motor mounts. the motor may be moving around causing the noise.

if you can make the car make the noise, take him for a ride so he can hear it.

Roy
Feb 15, 2018 at 1:48 PM