Kia Troubleshooting Questions? Ask a Mechanic
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The best way to determine the soruce of the noise would be to remove the drive belt and then start the engine quickly and recheck for the noise. If the noise clears then take your hand and spin each pulley looking for any signs of roughness as well as any excessive play. This will help you determine which pulley is failing. Check this and post back with your results and we can work from there if need be.
Excessive play in the timing belt would not usually cause a clicking noise. Pulling the drive belt would help you determine if in fact that is the case. If the noise clears with the belt off then its likely one of the pulleys and or water pump.
Your not disconnecting the timing belt. You removing the drive belt for the water pump and accessories.