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2008 mdx i picked up a timing belt kit from napa and it came with a service bulletin and a shim for the idler pulley for a timing belt chirp in the bulletin it say,s all 2008 were affected and that you should use the shim and grind a relief in the engine mount bracket so the idler pulley clears by 95 thou, then i read on another site that if your current belt is not chirping then you dont need the shim, so my belt doesnt and never did chirp so should i use the shim anyways or toss it????????
 

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I have a 2007 and the belt made a chirping sound. I had the shim kit installed. U don't need the shim kit if the belt didn't make the sound.

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