power steering noise

ANYTHING TO DO WITH STEERING, FROM STOCK TO RACK AND PINION UPGRADES

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mike4300
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power steering noise

Post by mike4300 » Sat Jan 21, 2012 1:30 am

here is one for all you guys. ive got a 96 astro when i bought it it had a power steering whine, so i replaced the pump after 3 pumps 2 from autozone and 1 from oreilly's i decided to try a used one same whine with all of them steering is good i replaced the pressure line (pump to hydro) with one from advance auto . i have no leaks what so ever and at the present time am running royal purple synthetic fluid. i have tried almost all the different ps fluids nothing changes still the whine. my thinking is that either i got a bad hose and its restricting the flow or the hydro boost unit itself is the culprit anyhelp from you guys would be a big help.

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timelessbeing
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Re: power steering noise

Post by timelessbeing » Sat Jan 21, 2012 2:27 am

My power steering has been making noise pretty much since I got the van. It's more of a moan or groan at low speed. At high speed, like on a curvy highway, it becomes a whine. I never figured out what it was, but the steering works fine, so I got used to it. I wish I could be of more help.

astroturf
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Re: power steering noise

Post by astroturf » Sat Jan 21, 2012 4:24 am

There is a TSB out there somewhere which speaks about the lines orientation. The pump also has a certain pressure requirement.

Look at/for those two items.

Jim

mike4300
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Re: power steering noise

Post by mike4300 » Sun Jan 22, 2012 12:03 am

thanks i'll check them out...i should state that at idle its quiet anything above that you get the whine

rpjn59
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Re: power steering noise

Post by rpjn59 » Wed Jul 25, 2018 9:53 pm

Mike, how's that P/S pump doing? My does the same thing.

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Re: power steering noise

Post by Astrophysics » Fri Jul 27, 2018 6:28 am

Hi,

I recently changed both ps pump and hydro boost on my 2003 AWD Astro which has 130,000 miles.
I too changed pressure hoses and I used ACDelco fluid. I flushed the system with 3 qts of fluid, as per shop manual, etc.
I also, used amity vac and bleed air from system.

It works well and is quiet.

There is a good You Tube video that shows how to replace hydro boost. See Eric the Car Guy on You Tube.

Also, I have replaced the OEM power steering cooler lines behind bumper with finned cooler located on lower left side of the radiator.

AP

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