Alternator noise with new belt

[callbay]

2011 Ford Fusion with 2.5 4 cyl. 91,500 miles.

The alternator was making a noise that sounded like a bearing. I checked carefully with an engine stethoscope to make sure it was the alternator.

When I installed the new alternator I put on a new belt while I was at it. The new belt was a Gates but I had to get the belt tensioner to the max to let me let the belt on. it does not seem overly tight now though.

The new alternator makes a bearing noise now although not as load as the old one. I thought the belt would break in and stretch some but with 250 miles on it the alternator still makes some noise.

Any thoughts?

Thanks!

 

[JohnnyJohnson]

New Alternator or rebuilt Alternator? What's the warranty?

 

[Chris142]

Bad clutched pulley?

 

[JMJNet]

With parts quality now, you almost cannot assume a new part as good unless it is tested.

Sounds like nothing wrong except you get a bad alternator?
Did you test to see if it generates amp as per the specification?

 

[WobblyElvis]

With the engine running spray the inside of the belt with a little water. If the noise changes, it's related to the belt not the bearings.

 

[Lolvoguy]

Originally Posted By: WobblyElvis
With the engine running spray the inside of the belt with a little water. If the noise changes, it's related to the belt not the bearings.


bingo!