P/S - Pump Noise/Increased Steering Effort
88olds12SUBJECT POWER STEERING PUMP NOISE/
INCREASED STEERING EFFORT DURING LONG TURNS OR AGGRESSIVE MANEUVERS
1986-88 DELTA 88, NINETY-EIGHT AND
MODELS/YEARS TORONADO MODELS EQUIPPED WITH 3.8L V-6 (VIN CODE B, 3) OR 3800 V-6 (VIN CODE C) ENGINES
NUMBER: 88-T-71A
CORP. REF. NO.: 803201R
DATE: July 1988
SECTION: 3B3
This bulletin supersedes Dealer Technical Bulletin 88-T-71 which may be discarded. This bulletin is being revised to include the Toronado models.
Some customers may comment about the level of power steering system noise.
Some customers may comment about increased steering effort during long-duration turns and/or aggressive driving maneuvers.
Some customers may comment about both conditions.
In cases where customers have comments about power steering system noise, even after bleeding the power steering system (see new bleed procedure below), the power steering noise condition can be corrected by installing a new reservoir, part number 26009846, available through GMSPO. This new reservoir has increased baffling and is approximately 6 mm (.24") taller, and will prevent fluid aeration due to sloshing.
FIGURE 1:
The steering effort condition can be corrected by installing a new flow control valve (called out as an O-Ring Union Fitting" in the parts catalog), part number 7840203, available through GMSPO (see Figure 1).
On a customer's first report of power steering noise, the steering system should be bled, using the following new procedure:
1. With the engine off and front wheels off of the ground and turned all the way to the left, add power steering fluid to the "full cold" mark on the fluid level indicator.
2. Bleed the system by turning the wheels from side to side without hitting stops. It may require turning the wheel several times. Keep the fluid level at the "full cold" mark. Fluid with air in it has a tan appearance. This air must be eliminated before normal steering action can be obtained.
3. Start the engine. With the engine idling, recheck the fluid level. If necessary, add fluid to bring the level to the "full cold" mark.
4. Return the wheels to the center position. Lower front wheels to ground. Continue running the engine for two or three minutes.
5. Road test the car to be sure the steering functions normally and is free from noise. Inspect for fluid leakage at connection points along the power steering system.
6. Recheck the fluid level. Make sure the fluid level is at the "hot" mark after the system has stabilized at its operating temperature.
NOTICE: When adding fluid or making a complete fluid change, always use GM Part No. 1050017 (or equivalent meeting GM Specifications No. 9985010) power steering fluid. Failure to use proper fluid will cause hose and seal damage and fluid leaks.
Use applicabe labor operations and times.