My 2002 blazer 4.3l Vortec is making a grinding sound upon excereration that stops when the pedal is eased up on. The sound could be light/thin metal or plastic. The sound seems to be coming from the drivers rear of the engine compartment. I have ruled out the PCV valve, Idler pully, tensioner pully, alrernator, power steering pump, ac compressor and belt.i am at a loss, please has anyone seen this before.

 

just a thot, check your motor mounts, it may have a bad mount letting the engine rock and making a contact somewhere

 

Thank you, i will check those out. I am looking at the ignition rotor given the sound type and location as well. I will post an update directly.

 

I agree with odat. The noise can be the fan blades hitting the radiator shroud.

 

Checked the fan clearance is ok. Thanks foe the thought any other ideas?

 

Are there any signs of rubbing on the ends of the blades or the shroud?

 

Not that i can see.