geekpipe Posted February 4, 2014 Share Posted February 4, 2014 Hi Have an 01 ls430 and it started to make an ugly whine under hood. Took a video...Not sure what is the issue... Could anyone try to diagnose by watching video? Sure would like an idea before bringing it to shop. Thanks kevin Quote Link to comment Share on other sites More sharing options...
Steve Posted February 4, 2014 Share Posted February 4, 2014 Thanks for posting! and sharing the video. sounds like the alternator or waterpump bearings... i would say sounds more like alternator. Have you recently had new belts or had them tightened? Quote Link to comment Share on other sites More sharing options...
curiousB Posted March 6, 2014 Share Posted March 6, 2014 worn bearing on some item on the belt. Remove the belt and turn the pulley on each device. I suspect with that loud a noise you can do the "One of these things is not like the others..." to find out the one with shot bearings. Failing that get a mechanics stethoscope and probe near the bearing of each device. The bad one will be very obvious. Quote Link to comment Share on other sites More sharing options...
Zett123 Posted March 12, 2014 Share Posted March 12, 2014 Don't forget to test the belt tensioner pulley also. Quote Link to comment Share on other sites More sharing options...
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