Nissan Repair: buzzing noise after timing belt change, camshaft sprockets, drive brackets

Question
I recently changed my timing belt.  I followed the repair manual but now I am hearing a buzzing noise coming from the front of the engine when I am driving.  It only happens when the rpm is between 1500 and 2000. It sounds like a loose heat shield or a toy lawnmower sound.  I suspected it might be the belt tension but I followed the manual which said the belt should have 0.51-0.59" of deflection measured in the middle between the camshaft sprockets with 22 lbs of force.  Does it sound like the belt is too loose or too tight or something else?  Please help!

Answer
Neyak,

Sounds like you did a perfect job on the timing belt.  However, if you did not replace the idler tensioner pulley that could be making the buzzing noise.  Also, a loose timing cover bolt or clip can make the noise if the belt makes contact.  One other thing is the assessory drive brackets.  If any are loose, just slightly, they can buzz too.