SOURCE: 1999 Pontiac Bonneville serpentine belt installation.
if you look by the crankshaft pulley to the right you will see a tubular looking shaft about 1" diameter , you will notice you can't get the belt out from under this piece , it has a nut on it , once you take the nut off , you will notice it has a star shaped point on the tip of the stud , it requires a reverse torx socket or wrench to remove the stud , when you get the stud out the tube piece it can be removed , then the belt comes off , replace the belt , now comes the tricky part , fitting that tube spacer back into its spot , it can be difficult , once its in place put the stud back in , and put the nut on and tighten it , your pretty much a pro now . thanks.
SOURCE: need to replace serpentine belt
Use a break over to unload spring tensioner and pull old belt off. Look at belt diagram and reinstall new belt pull back tensioner and install.
SOURCE: Replace serpentine belt on a 1995 Saturn sl1. 1.9 engine
Yes! It is a whole lot easier and faster to take off the passenger tire. Remove plastic cover with speed pins. It is a lot easier to get to the belt tensioner to release belt tension also.Just put a 14mm wrench or 9/16" wrench on the tensioner at the 4:00 o'clock position and push down the belt will be easy to remove and reverse this to install the new one GOOG LUCK *****badgto1NJ
SOURCE: know how serpentine belt goes on, but need to know
Yes you will have to loosen motor mount and jack motor slightly to change belt.
SOURCE: i need a serpentine belt diagram for a 97
Here ya go...
Serpentine drive belt routing-GM “C and H” Bodies 3.8L (VIN 1) engine
On Bonnevilles (1996 SE ), the belt is routed around the front engine mount to get to the air conditioner accessory. Once you turn the tensioner counter-clockwise using I believe 5/8" socket with a 1/2" drive breaker bar, so you have good leverage, you can remove the belt from the accessories. The front engine mount has three legs that connect to the front of the engine (on the passenger side of the car). You have to unscrew the lowest of the three mounting points (easiest done from the under side of the car, with the plastic shielding moved out of the way), which is right next to the crankshaft pully. Then there is a round tube spacer in between the engine block and this leg of the engine mount that you take out, and you can pull the belt out through there.
Fig. Fig. 8: You can use a box-end wrench on the pulley nut to rotate the tensioner ... 
Fig. Fig. 9: ... then remove the belt from the pulleys 
Fig. Fig. 10: Serpentine drive belt routing and removal - 3.8L (VIN L) engine shown, VIN C similar 
Fig. Fig. 11: Make sure to note the drive belt routing prior to removing it - 3.8L (VIN K) engine shown 
Fig. Fig. 12: Drive belt removal on a 1992-95 supercharged engine 
Fig. Fig. 13: Many vehicles have a label you can check to be sure the belt is installed and routed correctly
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