Power Steering Tips
Diagnosing Power Steering Problems
When trying to determine what is causing a problem in your power steering, keep this in mind. If the
problem occurs only in one direction, the problem is probably in the box or rack. If the problem is in
both directions, it is most likely the pump, dirty fluid or hoses. Be sure there are no kinks or
obstructions in your power steering hoses.
Dirty Steering System
Before changing any single component of the steering system, inspect the cleanliness of your system.
Dirty or black fluid can quickly ruin new steering components. If changing the box or rack, rub your
finger on the inside of the reservoir. If it isn't clean, you must flush the pump and hoses with clean
fluid before installing new components.
Bleeding Power Steering
All power steering systems are designed to be self-bleeding, but sometimes they need a little help.
After installing new components, fill the reservoir and let it sit for a few minutes. Raise the front
end of the vehicle and turn the wheels back and forth slowly with the engine off to allow the steering
box to draw fluid. Keep the reservoir full. When the fluid level stops dropping, start the vehicle and
continue turning the wheels. When the fluid level remains constant the system is fully bled.
Put cardboard under the front tires while testing your steering system. The cardboard will slide
on the floor and prevent wearing flat spots on the tire from excessive turning of the wheels while
not moving.
IMPORTANT NOTE: All GM power steering pumps generate approximately 1,000 to
1,200 PSI of line pressure. This is compatible with GM steering boxes and GM rack and pinion
units. If these pumps are used with a Mustang II rack & pinion, the steering will feel too sensitive
on the highway. This can be corrected by adjusting the pump's flow control valve to generate the
proper pressure for the Mustang rack.
Submitted by George G.
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