I was told my tensioner and idler pulley is bad on my truck. I just bought a new tensioner and was about to get an idler pulley but I ran into a problem. Are there two idler pullies? One to the left and right of the alternator? I'm fine with replacing both but need to make sure I order the right part.

 

Any help?

 

https://www.f150online.com/forums/v8...placement.html

Not sure which engine you're running or what accessories you have but you get the drift. Google is your friend, try searching Serpentine Belt Diagram for your truck or open the hood and count the pulleys that aren't attached to the alternator, water pump, power steering, ac, tensioner, or crank. Everything else is Idler.

 

https://www.f150online.com/forums/20...y-install.html

 

This is what a bad tensioner pulley looks like. Pulled it off and bearings started falling out everywhere.

 

Were there any symptoms of it being bad? I hear an occasional clicking from that tensioner area at times.

 

Yes, severe knocking and rattling noises.