What pulley is under the alternator?
The idler pulley is a common part that’s found on the majority of the vehicles on the road. Its primary function is to provide tension and guide the engine drive belt. These belts wrap around the various parts of the engine such as the power steering pump, alternator, water pump etc…
How do I know if my alternator decoupler pulley is bad?
A bad alternator pulley initially will cause excessive tensioner movement. A short buzzing or chirping sound can be heard for 1 to 5 seconds after shutting down the engine. The sound can also be heard during engine start. It is because of the worn out bearing and it can cause further damage to the belt.
How much does it cost to replace an alternator pulley?
The total price to replace the idler pulley typically ranges between $80 and $200, with the parts ranging between $40 and $90, and the total labor cost averaged between $40 and $110.
What’s the ratio of crank pulley to alternator pulley?
Divide your alternator pulley size into your crank pulley size to get the ratio. Example: If you have a 6″ crank pulley and a 2″ alternator pulley. 6/2=3. You have a 3 to one ratio, you multiply your engine RPM by 3 so if your engine is turning 1500 RPM’s your alternator is turning 4500 RPM’s.
Where is the alternator pulley located on a car?
In most cases, it will be located near the front of the engine area and close to the radiator fan. You will also notice a rubber belt attached to the pulley and alternator. Take an appropriate size wrench or socket and loosen the tension on the belt. Then remove the alternator belt from the pulley and alternator.
How do you wire an alternator in a Chevy?
How to Wire a Chevy Alternator. Connect the #2 terminal to the positive terminal on the battery. This terminal can also be jumped directly to the BAT terminal. This line is used to regulate the power generated by the alternator. Attach the alternator fan belt to the pulleys on the engine and alternator.
Why do you need an alternator decoupler pulley?
Then a few years later the Overrunning Alternator Decoupler type pulley (O.A.D.) was introduced. Typically three reasons are given for the introduction of these new more complex pulleys. The reduction of the mechanical load (drag) on the entire belt system which reduces the vibration in the belt drive system and decreases belt tensioner motion.
Divide your alternator pulley size into your crank pulley size to get the ratio. Example: If you have a 6″ crank pulley and a 2″ alternator pulley. 6/2=3. You have a 3 to one ratio, you multiply your engine RPM by 3 so if your engine is turning 1500 RPM’s your alternator is turning 4500 RPM’s.
How does an alternator work on a Chevy?
The GM alternator used in all Chevrolet models is easy to install, as it is connected using only a few wires. The alternator converts the engine’s mechanical rotations into an electrical current using a pulley-and-belt system. This current is fed to the car’s battery, charging it for later use.
What happens if I change the pulley size on my lternator?
Caution must be noted: Changing the pulley size on your a lternator may void the manufacturers warranty. Spinning your Alternator faster will increase brush and bearing wear.
Is it possible to increase the output of an alternator?
Yes, you can increase your alternators overall output as well as increase power output at engine idle speeds. Check the size of the pulley on your alternator. If you are having problems with overall alternator output or charging at engine idle, maybe a smaller pulley is all you need.