RookieLEX

I have this v-belt/serpentine sound back in Aug and mention it to my mechanic when I went in for an inspection and oil change. I normally hear it in the morning on start up but after driving for 15mins or so the sound goes away. He said he look into it and to see if i need an adjustment. Ever since then I haven't hear the belt sound until last week. Does this mean I need to replace it soon/or readjust it? I think he said once the car is running the belt will readjust by itself? I am currently at 55k miles should I just replace it? How does these belt normally last to? BTW: I have a 2010 ES

ESh

You can't adjust the V-belt on those cars. Buy a can of belt dressing and spray it on the inside with the engine running.

RookieLEX

what does that spray do? am I do for a replacement at 55k miles?

chuyrobles

Noise can also be an idler or alternator pulley bearing. And while the belt cannot be adjusted manually, there is a belt tensioner that, if it is not applying the proper tension on the belt, will cause it to squeak. A mechanic's stethoscope should reveal a bearing problem. There are some tricks on checking the belt. See:
http://www.daycoproducts.com/diagnos...and-belt-noise

ESh

If the belt is dry, the spray will lube it. CRC belt dressing is the best.

RookieLEX

Ok thanks. I will follow up with my mechanic the next time I'm due for an oil change.
The sound does not come on every morning it's more of a random thing.

RookieLEX

Replaced the belt no more sound on cold start. 😀