EsLalo350

Can anybody help me letting me know if this is normal car sounds like a loud rattling noise as if something is loose while it’s running not just on a cold start up also I threw water on it nothing leaks

Nelexus88

From the sound, my guess would be water pump bearings going bad. If you are handy with tools, pull off the serpentine belt and see if the rattle stops. Caution -Do not run the engine for more than a minute or 2 without the belt.

swfla

iTrader: (1)

i believe that the tension/idler pulley is an occasional issue with this engine model, creating sounds like yours. Lexus offers a heavy duty upgrade pulley as well as standard pulley.

ESh

Idler/tension pulley bearings or the WP.

times1

2013 ES350 64K miles. Recently noticed engine chirping on passenger side when cold start. Stops after 1-2 miles of driving. Did the "water test" and noise immediately stopped! Think I have an annoying serpentine belt that may be wearing out. Noise just started so I'm not too worried at the moment. However, about to drive car from northeast to Florida this weekend. Would you recommend I get the belt replaced ASAP or wait until I get back to FL?

Videos here
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Epcole

I'd replace the belt. It's about 1000 miles to FL, I think it's worth the $150 to get the belt changed before.

mrsteve7

It sounds to me like a wearing pulley bearing, either tensioner or idler.
But yes, have the belt replaced and the pulleys assessed for condition.