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Discussion Starter · #1 ·
So I recently pulled my motor in my 2007 WRX due to the timing belt tensioner bolt snapping off. I got the motor back in the car and noticed a new noise it’s sorta like a rattling sound but i can’t really describe it. I’ve climbed under the car and it sounds like it’s near the up pipe but I’ve double checked all the bolts and everything is tight. It has a new IAG header and Up pipe. The noise gets quieter when you go above idle but as soon as you let off the gas it gets quite loud.
 

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In Æternum
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Unfortunately, this is virtually impossible for us to diagnose from our armchairs, partway around the world.

My suggestion to you is get a mechanics stethoscope and try to lock down a more concrete location. Failing that, take the car to a trusted mechanic.
 
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