Caution: Be careful not to damage the crankshaft threads. If the pulley does not come off easily when using alternative tools as described below, STOP the procedure. Purchase a special device or contact specialists who have it at their disposal. Be careful not to damage the crankshaft end surface or front engine casing.
Note 1: when performing the procedure, you must use the following special equipment: puller (GM# J-44226 or equivalent), crankshaft end surface fuse (GM# J-41816-2 or equivalent), pulley installation tool (J-44218 or equivalent). Instead of the listed devices, you can use a puller with three jaws, a deep socket head, which should be installed in the crankshaft shank and protrude with its lower part from the hole (for the stop of the puller screw) and a pressing device that screws into the crankshaft shank and presses the pulley.
Note 2: The pulley does not have a C, - J key on the crankshaft, and can be correctly installed in any position. The pulley washer must be replaced with each installation.
Removal
1. Remove the radiator (see chapter 3).
2. Remove the drive belt (see chapter 1).
3. Remove the torque converter service plate. located in the engine sump (see illustration); When the pulley bolt tightening force is weakened, it is necessary for an assistant to fix the flywheel motionless by wedging the ring tooth with a large screwdriver.
11.3. To block the crankshaft when unscrewing the pulley mounting bolt, remove the marked plug and wedge the gear ring of the drive disk with a screwdriver
4. Remove the crankshaft pulley bolt and install the shaft end guard.
5. Connect the puller and remove the pulley and its washer.
Caution: If you are removing a pulley using a three-arm puller, clamp the pulley bushing without gripping the outer circumference. It is also necessary to introduce, for example, a socket head, which will have a solid fit in the hole of the crankshaft shank, and at the same time protrude with its base in the hole - this is necessary to stop the puller screw. Do not attempt to remove the pulley with the puller screw resting on the shank, as this will most likely damage the crankshaft shank threads.
6. Using the appropriate tool, pry and remove the crankshaft oil seal (the housing has grooves through which access to the outer edge of the oil seal is provided).
Installation
7. Inspect the pulley for chips and grooves on the contact surface with the oil seal. Also inspect the drive belt contact surface, which is located on the outer circumference of the pulley.
8. Lubricate the outer surface of the oil seal.
Note: in the absence of direct instructions in the manufacturer's instructions, do not lubricate the inner surface of the oil seal that is in contact with the crankshaft - the oil seal is installed dry. Failure to comply with this requirement may result in oil seal leakage after assembly.
9. Using the installation tool, insert the oil seal into the front casing until it stops.
10. Install and press the new pulley washer onto the crankshaft.
11. Raise the car and place vertical supports under it.
12. Place the pulley on the crankshaft and insert it into its original position using the installation tool.
Caution: Do not drive the pulley in by hitting it with a hammer.
13. Remove the installation tool and install the pulley bolt and washer. Tighten the bolt to the required torque, having the help of an assistant, who at this time will jam the gear ring of the drive disk with a large screwdriver.
14. The remainder of the assembly is carried out in the reverse order of removal.