[Beegee87]

Hi guys,

I'm having an issue with a noise that's causing me some concern. I have an '07 Caliber SE, manual transmission, 1.8L. The noise started when I replaced the alternator. I originally replaced the alternator due to the decoupler pulley, but the alternator itself also needed to be replaced. The noise is a high pitched whine, not like the turbo noise I have read about, and only occurs when the vehicle is in gear and I accelerate. First and second gear are faint, but the faster I go the louder it gets; there is no pitch change. When going 70+ it sounds like I'm going to murder my vehicle and there is a "humming" feeling in my pedals and steering wheel. If I push in the clutch a toe's length while still pushing in the gas pedal the noise stays. There is no reaction when I downshift or idle. This issue only happens when I push in the gas pedal and in gear. Has anyone had this problem or have an idea of what the issue may be? Thank you so much!

 

[Darlo]

Hi, I have exact same issue, were u able to find a solution to it, this has been going on for at least 2 years, and the noise is driving me nuts

 

[John Galt]

Could be a wheel bearing, transmission, brake rotor/pad, or any number of other things. This kind of noise can be difficult to diagnose, but check the wheel bearings and brakes first.

 

[chrisf2012]

If (like the OP) this noise didn't start until you replaced the alternator then the alternator is likely the culprit. Remanufactured alternators are notoriously problematic and you can go through a few brand new ones before finding one that actually works. Given how difficult it is to change them on a Caliber, buy a brand new name brand alternator (Denso makes one I believe...IIRC Mitsubishi was the OEM supplier) with the decoupling pulley already installed and call it a day.