Is this normal pulley behavior ?

[2004mountaineers]

Is this normal pulley behavior ?



2004 Mercury Mountaineer, 4liter v6, awd.

 

[wollimann]

Is this normal pulley behavior ?



2004 Mercury Mountaineer, 4liter v6, awd.

If you worry about these little vibration, i would say it is normal.
If there are no other issues (sometimes the pulley-arm get loose) you could release the belt tension
and feel if the bearing has play, also take a look at the guide pulley bearing.

 

[Turdle]

Extreme example of normal

 

[leadfootdriver]

Check your Harmonic Balancer. They are known to fail on 4.0's. I've replaced mine already..

 

[CallMeSyd]

Lol yes it's normal for the tensioner pulley to move like that. It's doing its job. It is spring loaded. That's actually really smooth compared to some.

 

[donalds]

Looks normal to me