Nissan lower idler pulley and belt replacement. Nissan lower idler pulley and belt replacement - 1999 Altima. Recently making noises. I couldn't tell if it was coming from one of the pulleys, the alternator, power steering pump or air conditioner pump. Then one day at a stop light smoke started coming out from under my hood because the upper idler pulley had locked up and was smoking the belt. After replacing the top idler I still had noise coming from somewhere. It turns out my bottom idler was going bad at the same time as the top! In today's video I change out the bottom ilder pulley and replace the belts.
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