Installed new water pump, thermostat, and idler pulley on my N/A. Did not have any loud noise or water leaks, but thought best to inspect belt drive before Eureka Springs. Car has 108,000 mi. Everything I replaced was original. I took the tension off the serpentine belt to check the bearings and found the idler bearing dry and the water pump drive pulley had a wobble in it. Purchased "Gates" at rock auto for replacements: The thermostat is OEM Wahler, the water pump was made in China and I had to tap the two holes (6x1.0) that hold the bracket for the camshaft sensor, the idler is made in Canada. I also flushed the cooling system and installed a new belt.