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Need help on powers steering noise
#1
Forum,
I recently changed the power steering pump and steering box. Changed the pump as it was squeeling at either end of the turn, and put in a 12:1 Lares 807 gearbox. I'm running March aluminum pulleys.
Following the installation I bled the system and it felt tight and sounded much quieter- no squeeling. My son drove it the next day, all looked good, but when he pulled into the garage the squeeling was back. I have bled the car several times ( using the vacuum method ) and each time the sound goes away, then comes back.
So here are my questions:
There are no leaks in the system- could air be pulled in somehow?
Is there an optimal pulley size for our rides- and does it change if the ratio changes?
I've read that pumps should match the gearbox - any ready references out there, or do I need to call Redhat or someone of that ilk?
And finally, any other ideas that you guys have?
As always, thanks for the help!
Butch

"A really great man is known by three signs-generosity in the design, humanity in the execution, moderation in success." -Otto VanBismark

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#2
Do you have an fluid cooler on the power steering system? Hot steering fluid can cause the squeal that you are describing. What happens if you let the car sit a few hours and then starting it again, is the squealing gone initially and then it comes back? Burnt fluid can also cause this too.

-john
(jbojo)
351C 4V cc heads, 10.5 : 1 CR, 290 Herbert cam, Flat top forged pistons, forged connecting rods, Atomic efi,
C6 with Gear Vendor overdrive, 3.89 Tru Trac, Hooker Super Comp with 2 1/2" Pypes Exhaust.        

Some Mod pictures can be seen at:

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#3
My first thought is that the squeeling sound is the belt slipping?


Just a thought

Paul
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#4
John-
Good thought - the cooler came off when the ac compressor pulled. The noise happens in both scenarios cold or hot.
Paul-
One of my initial actions was to replace the belts - went with the Continental that was reported to be the best. I'm considering taking a scotch brite pad to the grooves on the pulley.

Thanks -

"A really great man is known by three signs-generosity in the design, humanity in the execution, moderation in success." -Otto VanBismark

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#5
Scotchbrite is a waste of effort IMO

Make sure the "V" of the belt is the right width.

I've seen a too skinny a belt used and it will slip and squeel.

The belt should be flush or a bit proud in the pulley you can
also try a bit of belt dressing.

Paul
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#6
jut a quick question:

using type 'F' or power steering fluid?
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#7
72HCODE;242421 Wrote:jut a quick question:

using type 'F' or power steering fluid?

HCode-
F Type.
Thanks for checking....

"A really great man is known by three signs-generosity in the design, humanity in the execution, moderation in success." -Otto VanBismark

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