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engine making a loud knocking at low RPM

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Old Apr 9, 2017 | 04:44 PM
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engine making a loud knocking at low RPM
I have a 2007 g35s with 109,000 miles and when you rev the engine when it is still warming up it makes a knocking sound at around 1100-1800 RPM. I've taken it to 2 mechanics and Nissan dealership and none of them have been able to fix the problem. any ideas that might help??
 
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Old Apr 9, 2017 | 07:35 PM
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Where is it coming from? Bottom of the engine? Side? It matters.
 
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Old Apr 11, 2017 | 04:06 PM
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knocking
its coming from the passenger side of the engine on the top
 
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Old Apr 11, 2017 | 09:29 PM
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Might be your timing belt tensioner. Had a similar noise in the V6 626 I used to have. Noise went away at around 1800-2000 rpm.
 
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