Belts have to make at least a 180° wrap around engine components. To do that, they sometimes have to place an "idler roller" under the component before they can route the belt to the next component. That idler roller doesn't power anything. It just keeps the belts wrapped properly around the preceding pulley. The roller has a bearing in it and sometimes that bearing wears out.
Rick
I'm a retired ASE Master/L-1 Technician. I still keep current with the latest automotive technology. Visit my blog for cool articles and TSB's: http://free-auto-repair-advice.blogspot.com
If you are referring to the Serpentine belt, you loosen no pulley. You simply remove tension from the belt. The tension is applied by the Idler Pulley. Pry the idler back and remove the belt.If you are referring to the Serpentine belt, you loosen no pulley. You simply remove tension from the belt. The tension is applied by the Idler Pulley. Pry the idler back and remove the belt.
== == it is a free pulley that works as a tensioner on any belt bolted to hold or spring loaded An idler pulley usually tensions a belt.. eg supercharger belt is kept taut by its respective idler pulley
It's a pulley that guides the belt
Remove the belt, then remove the bolt holding in the idler pulley.
Take the belt off, un-bolt the idler pulley, bolt the new pulley on, and finally put the belt back on and Viola!!
An idler pulley is a pulley that does not drive and is not connected to any device that is driven. It serves to either tension a belt or to route a belt to clear an obstacle.
Belt is worn out, or the idler pulley is defective. Replace the belt and inspect the idler puley.
The idler pulley has nothing to do with the brakes. If the idler pulley is bad it could throw or break a belt, and then your engine will stop.
Take the belt off, take the bolt off of the idler pulley, take the pulley off, put a new one on replace the bolt, and put the belt back on
Are you talking about the "idler pulley"? They are quite simple to change. Loosen the serpentine belt by using a socket on the center of the tensioner pulley, slide the belt off the idler pulley, use a socket to pull the center bolt of the idler pulley and replace the pulley with a new one.
The idler pulley on any vehicle is used to maintain the proper tension on the vehicle's belt(s). without it belt maintenance would be difficult.
you should be able to put a socket wrench in the front of the idler pulley. Push away from the tension of the belt, then remove the belt. MAKE SURE you remember how the belt came off. Loosen the bolts on the pulley, then remove. Install new pulley, then put the belt back on.