The power steering pumps maximum pressure should be set at a minimum of 200psi above the system operating pressures. To increase the maximum pressure setting on all gm except 1963 82 corvette power steering systems proceed as follows.
Modifying Your Power Steering Pump Gm Truck Central
Gm power steering pump pressure adjustment. Remove the power steering pressure hose from the back of the pump. Screw on the backside of the flow control valve assembly 6 that is inside the pump. As outlined in our pressure vs. Turn one takes the type ii pump better with reduced flow pumpsaround 10 gpmwhich further. This is generally caused by excessive pump pressure borgeson offers a pressure reduction kit part number 899001 that will allow the customer to adjust the. Flow article it is adjustments to the flow that improve your steering feel.
You turn steering wheel left. The proper way to gain steering feel is to use a properly sized turn one flow restrictor. The larger the hole the more fluid the pump is able to use to respond the power steering pumps use of pressure. The control valve in the steering rack or box essentially communicates to the pump how much pressure to provide the system. Idlelow rpm flow modification the fitting orifice controls the volumespeed that the pump can use to restore operating pressure flow piston controlled. The late model type ii power steering pump generally moves around 15 gpm which translates to less heat.
Replacing the factory flow restrictor the vari flow valve allows the user to adjust steering feel at the wheel without having to remove the pump or lines from the car making it a breeze to calibrate the cars steering for track days as well as normal street driving. The pump only builds pressure when it is required to by the steering rack or box control valve. Adjusting the steering box can be easily done with a few tools to bring the power steering play back into acceptable limits. You will note that the hose nut screws into discharge connector fitting 24. Step 1 use a floor jack to raise the front wheels of the vehicle off the ground and place a jack stand under each side of the frame. For example if the systems requirements are a 1000psi then the pumps maximum pressure should be set at 1200psi or above.
The vari flow valve is a really neat component that can be installed to virtually any gm type ii power steering pump.
Gallery of Gm Power Steering Pump Pressure Adjustment
