Power Steering - Shudder

9218oldsmobile07

NUMBER: 91-T-177

CORP.REF.NO: 133208R

DATE: August 1991

SECTION: 3


SUBJECT:
POWER STEERING SHUDDER USE INSPECTION/ANALYSIS CHART


MODELS/YEARS:
1989-91 CUTLASS CIERA AND CUTLASS CRUISER
WITH 3.3L (VIN N) ENGINE


CONDITION:
Some 1989-91 Cutlass Ciera and Cutlass Cruiser models with the 3.3L (VIN N) engine may exhibit power steering shudder, a pulsing or resonating disturbance that the vehicle operator may hear and feel through the body structure and steering wheel. This condition is most apparent at low engine RPM and/or while making low speed turns.

CAUSE:
A combination of power steering pump pressure pulses and engine firing frequency generating a disturbance transmitted through the body structure.





CORRECTION:
Utilizing the Inspection/Analysis Chart shown, determine which of the power steering or engine components indicated have NOT been previously installed on the suspect vehicle.

INSPECTION/ANALYSIS CHART


Parts are currently available from GMSPO.

Install those components not found on the vehicle after performing the above inspection, following applicable service manual procedures and in the case of the crankshaft balancer kit, those indicated on the next page:


CRANKSHAFT BALANCER KIT INSTALLATION PROCEDURE:

Remove or Disconnect:
1. Negative battery cable.
2. Serpentine belt.
3. Raise car and suitably support, see Section OA.
4. Right front wheel and tire assembly.
5. Inner fender splash shield (right side).
6. Torque converter cover.
7. Hold flywheel with J 37096.
8. Balancer bolt.
9. Crankshaft balancer.

Important:
The balancer is serviced as an assembly. Do not attempt to separate pulley from balancer hub.

Install or Connect:
1. Crankshaft balancer.
^ Lubricate seal surface with engine oil.
2. Balancer bolt and washer.
^ Hold flywheel with J 37096.
^ Balancer bolt to 140 N-m (103 lbs.ft.).
- Loosen bolt to finger tight.
- Utilizing tool J 36660, retorque to 150 N-m (110 lbs.ft.) plus 56 degrees.

3. Inner fender splash shield.
4. Right front wheel and tire assembly.
5. Torque converter cover.
6. Lower car.
7. Serpentine belt.
8. Negative battery cable.

NOTE:
After installation of either of the hose assemblies and/or pump, it is essential that the system be properly bled following the procedure in Section 3B1 of the 1991 service manual.

WARRANTY INFORMATION:
Use appropriate Labor Operation Number and Time. Additional labor time to complete the repair should be submitted as required in straight time.