a squeaking chirping sound coming from under the hood

[RamRod]

Okay lets test our 5.3L knowledge here...

Ever since I bough my T there was an occasional high pitched squeak, or a chirp if you will, coming from under the hood.

At first it would be there for the first 5 min after start up ever 4th-5th start up.... Then it started to last longer and longer and then would happen more and more frequently.... To the point where I am today where it makes the sound every start up the entire time the engine is running...

A few additional things I noticed, the squeaking would be independent of speed, but dependent of throttle position. It only squeaks when the motor is running.

Took it to the dealer this morning and they are telling me that it a blower motor.... I thought, I assumed, it was a bearing on the accessory belt drive assembly or in the supercharger this whole time....

What are some of your thoughts based on what I have written.... my instinct is to call BS on the dealership, and since its a $400 job I dont want them to do the work unless it's 100% that's the problem...

Please enlighten me with your theories and things I should check into.


PS- I am calling the supercharger MFG right after this post to see what they think

 

[DJinCO]

Prius.

Do you have a Prius stuck under the hood?

 

[alrock]

Get a mechanics stethoscope and listen to the various parts. http://www.amazon.com/Lisle-52500-M...d=1382498617&sr=1-1&keywords=auto+stethoscope

Sound obviously travels but at least the things tied to engine speed like that are pretty easy to narrow down.

 

[SuperBuickGuy]

idler pulley







or a prius :giggle::giggle::shifty:

 

[RamRod]

Prius.

Do you have a Prius stuck under the hood?

:giggle::giggle:

I guess that means I should get a Hybrid badge now!

 

[08H3]

Disconnect the blower. If the sound goes away, then you can assume they were correct in their diagnosis. If the sound is still there, move on to looking elsewhere, but I'd take advantage of the dealer's diagnosis first.

 

[LagunaH1]

Blower motor... as in: HVAC blower? That ought to be easy to confirm or eliminate.

 

[RamRod]

Yes the HVAC. To be honest it should be easy, yet my experience with this dealership has had a poor track record... they eff up everything..

They replaced today, but before paying them I will be checking to make sure the sound is gone

 

[RamRod]

So it's looking like my dealer got something right for once!

The sound is gone and all they did was replace the blower motor (HVAC)

 

[RamRod]

Thanks for your input guys! No Prius stuck in there... Guess I can't be a hybrid anymore haha