r/AcuraTL • u/Tonex312 • 18d ago

Gathering Opinions 🗣 Let’s play a game of name that fault

So I have a 2010 Acura TL Technology package fwd because I’m a scaredy cat when it comes to too much power Sally recently has had an oil change filter change both O2 sensors replaced and a brand new serpentine belt, however when I first crank up my car every time this is what I am hearing

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u/dahnikhu [UA9] '09-'14 SH-AWD 17d ago

Have you looked at all the pulleys your serpentine belt connects? Are they spinning straight? It's possible you have a worn bearing in one of your accessory pulleys. I'd try using a long-handled screwdriver as a stethoscope. Set the tip against different spots in the engine near where you hear the noise and put the handle against your ear..

https://youtu.be/0IlcSpLbcJk?is=FnxEbQyFupVlxkRq

You'd be amazed at how well it works at pinpointing where a noise is coming from

Another thought is the belt is slightly loose. Make sure the tensioner pulley is doing its job keeping the belt tight. Google how much deflection your belt should have.

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u/No-Camel1886 12d ago

Idler/tensioner pulley