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Re: Power steering pump
Yes in most cases the pump rotor vanes cause this noise, there are additives that can help like one made by Lucas Oil, but if it is really whinning then that will be a watse of money, if you end up putting on a rebuilt pump make sure to flush all the old fluid out or the pump you just spent your hard earned money on will get noisey to.
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Have you checked the power steering fluid level? The reservoir for the fluid will be at the front of the engine, where the belt runs the power steering pump. If it's low or out add a little power steering fluid till full, then start car and slowly turn wheels back and forth from stop to stop-not too ******* the stops (when the steering won't turn further that way...that's what I mean by stops)....Turn wheel one way full travel, then reverse and turn the other way. Check the fluid level again, and add as needed.
If fluid is not low, the belt may be too loose to make the power steering pump work, or you may have a bigger problem that needs professional attewntion.
FIRST OF ALL TURN OFF RADIO REMOVE NEGATIVE BATTERY CABLE. THEN REMOVE POWER STEERING PUMP FLUID FROM POWER STEERING PUMP.USING A HAND PUMP SIPHON. BE CAREFUL DONT GET POWER STEERING FLUID ON CAR PAINT IT WILL DAMAGE PAINT JOB.PUT A DRAIN PAN UNDERNEATH CAR TO CATCH POWER STEERING FLUID THEN DISCONNECT POWER STEERING PUMP LINES.REMOVE POWER STEERING PUMP ADJUSTER BOLT AND MOUNTING BOLT.REMOVE POWER STEERING PUMP.MOST OF THE TIME NEW POWER STEERING PUMP DONT HAVE DRIVE PULLEY ON IT SO TAKE TO A MACHINE SHOP THE WILL REMOVE PULLEY FROM OLD PUMP AND PRESS ON THE PULLEY TO NEW POWER STEERING PUMP.BESURE TO BUY NEW O RINGS TO END OF PRESSURE LINE.ONCE NEW POWER STEERING PUMP HAS PULLEY IN PLACE AND YOU HAVE NEW O RING FOR HIGH PRESSURE LINE.INSTALL NEW PUMP.ADJUST BELT TENSION.NOW BLEED POWER STEERING PUMP WITH FRONT WHEELS POINT STRAIGHT A HEAD POSITION.POUR POWER STEERING FLUID IN PUMP UNTIL FLUID LEVEL ON COLD MARK ON POWER STEERING PUMP DIP STICK.KEEP ADDING FLUID UNTIL FLUID STOP DROPPING. START THE ENGINE LET IT RUN AT IDLE ADD MORE FLUID IF DROPS KEEP FLUID ON FULL COLD MARK.ON DIP STICK TURN OFF ENGINE.CHECK TO MAKE SURE POWER STEERING PUMP NOT LEAKING AT THE LINES THEN.SAFELY RAISE SUPPORT FRONT OF THE VECHICLE WITH JACK STANDS. MAKE SURE VECHICLE ON SOLID LEVEL GROUND CHECK.FLUID LEVEL MAKE SURE AT FULL COLD MARK. NOW START ENGINE.LET IDLE MINUTE.THEN TURN STEERING WHEEL ALL THE WAY TO THE LEFT TO RIGHT SEVERAL TIMES WITH OUT STOPPING IT IN PLACE. CHECK POWER STEERING FLUID WHEN FLUID LEVEL STOP DROPPING.AND FLUID IS NOT A TAN COLOR WHICH MEAN LOTS OF AIR IN SYSTEM. TURN OFF CAR UNTIL AIR BUBBLES DISAPPEAR.CHECK FLUID LEVEL BLEED POWER STEERING AGAIN. DONT DRIVE VECHICLE UNTIL STEERING FEEL NORMAL.IF FLUID REMAIN TAN WITH AIR BUBBLES CHECK FOR LEAKS AT POWER STEERING PUMP PRESSURE HOSE ORING. AND CHECK POWER STEERING LINES TO PUMP FOR LEAKS.
-- from the 1990-1999 Lumina / Silhouette / TranSport Repair manual ---
1992 Pontiac TransPort Power Steering Pump
REMOVAL AND INSTALLATION
Disconnect the negative battery cable.
Disconnect and cap the power steering pump hoses.
Remove the accessory drive belt.
Remove the power steering pump pulley using a suitable puller tool.
Remove the pump mounting bolts and remove the pump from the vehicle.
See Figures 1, 2 and 3
Fig. Fig. 1: On some vehicles, you must use a puller to remove the power steering pump pulley
Fig. Fig. 2: Power steering pump mounting-early model vehicle shown
Fig. Fig. 3: Power steering pump mounting-late model vehicle shown
Installation is the reverse of the removal procedure. Tighten the pump mounting bolts to 18 ft. lbs. (25 Nm).
Bleed the power steering system to remove trapped air. Air in the system could cause noise and or damage to the pump.
This procedure requires the help of an assistant.
With the engine OFF, the wheels off the ground and turned all the
way to the left, fill the fluid reservoir to the FULL COLD mark on the
fluid level indicator.
With an assistant checking the fluid level and condition, bleed
the system by turning the wheels from side to side without hitting the
stops. You should repeat this at least 20 times, making sure to keep the
fluid level at the FULL COLD mark.
Fluid with air in it has a light tan appearance. This air must be
eliminated from the fluid before normal steering action can be obtained.
See Figure 4
Fig. Fig. 4: Power steering bleeding procedure
Start the engine, and while it is idling, recheck the fluid level and add as necessary to reach the FULL COLD mark.
Return the wheels to the center position. Lower the front wheels
to the ground and continue running the engine for 2 or 3 minutes.
Road test the vehicle to make sure the steering functions properly and is free of noises.
1.check belt not too loose/tight
2.turn wheel over full lock and hold for about 30 secs then other lock.
that is about all you can do(whining noise normally associated with pump clutch,steering wheel would vibrate as you turn if it had air in system).to bleed the pump you loosen the out pipe on full lock,then tighten when fluid appears.
hallo if power steering fluid is bubbly, means that its sucking air somewhere before(sucking side) (or on) power steering pump. that would explain the noise. Check (when cold) fluid level. if level is low, top up before starting the car. had a lot of cars that high preasure hose was leacking fluid on restricting valve. if so, fluid comes out on the end of protecting cover of the hose. (driver side on spark plugs and down the engine). replace hose with original. do not try to make it your self, becouse steering wheel will shake, sinse restracting valve is missing. But if you press brake pedal, that has nothing to do with it. Marko
Hello, from the sounds of it your power steering pump is going bad. Two things to check is one, pull off the cap and smell the fluid to see if it smells burnt. If it does you will need to change the power steering pump. Another thing to check is to make sure the belt is good and snug that runs the pump, the noice could be the belt slipping. You may need to tighten it or change it depending on how it looks. I'd check the belt first as that is the cheaper fix.
If there is fluid in the pump and it makes noise, that may indicate that the pump is going bad. Some PS pumps just make noise. Ford pumps, for example make a lot of noise, and there is nothing wrong with them. If it's a squeal, it might mean the bearings in the pump are going bad.