[id10t4dirt]

New user and first post. I've search and haven't seen any other post that explain this noise. I have a 2012 taco 4x4 V6 6 speed. the noise started about a month ago. when i would first start in the morning using the clutch cancel button it would start and then make a squeaking noise for about 10-15 seconds then stop. Now that it is colder it does it when using the switch and when pushing in the clutch to start and does it longer. it kinda sounds like the starter turning but no grinding and it does not change with engine speed or pushing in the clutch. I've attached a link to a you tube video of the sound. Any input would be appreciated.
Thanks,
James Gersema


Link-

 

[Splicer]

Welcome to TN.... hope you find it & fix it soon. Just a guess but I think it sounds a lot like a failing throwout bearing.

 

[RTFM]

Yup, what Splicer said: my first guess would be a failing throw out bearing.

Quick test. Immediately after startup, while it is squealing, press the clutch in. If the noise stops or changes, throw out bearing is where I would look first.

 

[id10t4dirt]

No change in noise when pushing in the clutch.

 

[Splicer]

No change in noise when pushing in the clutch.

That *probably* rules out the throwout bearing.

Any chance it's coming from under the hood, such as from a belt-driven accessory, or an idler pulley? Maybe the serpentine belt itself. How many miles on the truck?

 

[Taco'09]

That's a strange one for sure. Sounds grindy to me even to the point of metal-on-metal, and it slows down. Try it again with the hood open and see if you can pinpoint it a bit better. One point is this is the only time when your air injection pump runs right after being started when the RPMs are high like that. Don't rule it out. It is located on the right side just below the washer fluid reservoir and is kind of a big black thing.

 

[id10t4dirt]

it sounds like its coming from underneath on the right side. just turned 95,000 miles. ill pop the hood when i leave work tonight and see if i can pinpoint its origin.

 

[RTFM]

Drivers or passenger side? Right or left is subject to where you are standing.

Under is easy, unless truck is inverted.