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 Post subject: power steering noise
PostPosted: Sat Jan 21, 2012 1:30 am 
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I am merely driving my van
I am merely driving my van

Joined: Wed Nov 09, 2011 4:38 am
Posts: 7
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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 Post subject: Re: power steering noise
PostPosted: Sat Jan 21, 2012 2:27 am 
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Joined: Fri Aug 08, 2008 7:55 pm
Posts: 2640
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.


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 Post subject: Re: power steering noise
PostPosted: Sat Jan 21, 2012 4:24 am 
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Joined: Thu Sep 10, 2009 1:25 am
Posts: 1692
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


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 Post subject: Re: power steering noise
PostPosted: Sun Jan 22, 2012 12:03 am 
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I am merely driving my van
I am merely driving my van

Joined: Wed Nov 09, 2011 4:38 am
Posts: 7
thanks i'll check them out...i should state that at idle its quiet anything above that you get the whine


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 Post subject: Re: power steering noise
PostPosted: Wed Jul 25, 2018 9:53 pm 
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I am merely driving my van
I am merely driving my van

Joined: Sat Jun 16, 2018 5:51 pm
Posts: 7
Location: Florida
Mike, how's that P/S pump doing? My does the same thing.

Ray

_________________
04 Astro
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 Post subject: Re: power steering noise
PostPosted: Fri Jul 27, 2018 6:28 am 
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I sleep in my van

Joined: Sun Jan 13, 2008 5:23 am
Posts: 738
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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