Crank shaft pulley not lined up

Tiny
FIREDRIVER741
  • MEMBER
  • 2000 BUICK CENTURY
  • 140,000 MILES
Notice a bad serpentine belt on my daughter's car. The whole inside of the belt separated so I replaced it and noticed immediately that it jumped halfway off the crank pulley.

After closer inspection, I noticed that the crank pulley is about 1/4 to 1/2 inch forward of all other pulleys (alternator, A/C, water pump, etc.).

I’m thinking harmonic balancer. Any other ideas?
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Friday, July 5th, 2019 AT 11:26 AM

3 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good afternoon,

Yes, very common issue. The rubber wears out the outer portion comes forward from the motion of the motor.

Roy

Notice: The inertial weight section of the crankshaft balancer is assembled to the hub with a rubber type material. The correct installation procedures (with the proper tool) must be followed or movement of the inertial weight section of the hub will destroy the tuning of the crankshaft balancer.

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1. Remove the drive belt.
2. Raise and suitably support the vehicle.
3. Remove the right front tire and wheel.
4. Remove the right engine splash shield. Refer to Splash Shield Replacement - Engine in Body and Frame.
5. Loosen the right frame bolts. Lower the right frame for access to the crankshaft balancer bolt with the J24420-C.
6. Remove the crankshaft balancer bolt and the washer.

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7. Remove the crankshaft balancer. Use the J24420-C.

Installation Procedure

Tools Required
- J29113 Crankshaft Balancer Installer

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1. Apply sealant to the keyway of the balancer. Use sealant GM P/N 12345739 or equivalent.
2. Install the crankshaft balancer. Use the J29113.
3. Remove the J29113.

Notice: Refer to Fastener Notice in Service Precautions.

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4. Install the crankshaft balancer washer and the bolt.
Tighten the crankshaft balancer bolt to 103 Nm (76 ft. Lbs.).
5. Tighten the frame bolts. Refer to Frame Removal in Body and Frame.
6. Install the right engine splash shield. Refer to Splash Shield Replacement - Engine in Body and Frame.
7. Install the right front tire and wheel.
8. Lower the vehicle.
9. Install the drive belt.
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Friday, July 5th, 2019 AT 3:24 PM
Tiny
FIREDRIVER741
  • MEMBER
Very helpful, thank you.
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Friday, July 5th, 2019 AT 3:30 PM
Tiny
ASEMASTER6371
  • EXPERT
You are welcome.

Always glad to help.

Roy
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Friday, July 5th, 2019 AT 3:38 PM

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