Hi all,
I know theres heaps of threads on noisy belts n stuff but i think this is a little different...
the noise only happens when the idle drops to around 800-900rpm. basically it sounds like a low moan.
i have checked and adjusted the tension of all the belts and CRC'd all the pulley bearings and pulled the idler bearing off, cleaned lubed and replaced. (i think thats what you call it, the lowest pulley under the power steer) still no result.
i then used a long screwdriver to the ear and onto metal parts of all the units to see if i can pin point the sound a little better. that ruled out the a/c, water pump and alternator (couldnt safely do this to the power steer unit) but i could clearly hear it with the screwdriver placed at the very front of the rocker cover??
so im assuming its coming from either the harmonic balancer or somewhere behind the timing cover.
anyone experience moaning sounds from these areas before?