OK, common noise locations in the belt drive for a 103 engine.
Fan idler bearing bracket.
Secondary idler pully (mounted to the fan bracket.)
Air pump clutch idler bearing (test this by activated the pump clutch by way of jumping power and ground to it while at idle)
On occasion the front bearing in the alternator will give it up as well.
Get a stehiscope (nope, cant spell) and check it. Just dont drop the thing into the drive, your ears will ring for a month.
Project Smoker, '87 603 powered wagon
Hauler, 96 CTD can you say torque?
Toy 73 Cougar xr7 convertible
Acme Automotive Inc.