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Power steering screech/grind noise at full lock

Old 06-30-2019, 11:09 AM
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Power steering screech/grind noise at full lock

Hey all. Have a question about a noise I get at full lock left or right. Iíve never heard anything like it on any vehicle. Car has been in storage for a few years now and Iím about to get it back next month. That being said, I know this power steering screech is gonna bug the crap out of me when I do get back to work on it.

My engine is the carbíd 2.8. Running v-belts still. Last thing I remember doing to the car to attempt fixing the noise was replaced PS pump and replaced all my belts.

This is noise isnít a quiet one either. It turns heads when it happens, so I usually try to be extra mindful and not turn my wheel full lock left or right. Itís not a typical ďwhineĒ itís more of a violent ďnails-on-a-chalk boardĒ kind of sound. Anyone ever heard anything like it? No air in system. Never have loss of power steering. Pump doesnít whine, noise only happens at full left or right lock.

Any my help or suggestions would be greatly appreciated.
Thanks!

black 83 2.8 firebird with factory t-tops
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Old 06-30-2019, 11:58 AM
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Re: Power steering screech/grind noise at full lock

Sounds like a loose belt; slipping in the pulley when the load is highest.

Try tightening it.

Might even need a new one; "replaced" whenever notwithstanding.
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Old 06-30-2019, 12:01 PM
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Re: Power steering screech/grind noise at full lock

Belts are tight. Is there a chance maybe to pulley is not seared all the way? Itís not the same noise as a belt squeal, itís definitely different
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Old 06-30-2019, 01:25 PM
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Re: Power steering screech/grind noise at full lock

Originally Posted by umopepisdn View Post
This is noise isnít a quiet one either. It turns heads when it happens, so I usually try to be extra mindful and not turn my wheel full lock left or right. Itís not a typical ďwhineĒ itís more of a violent ďnails-on-a-chalk boardĒ kind of sound. Anyone ever heard anything like it? No air in system. Never have loss of power steering. Pump doesnít whine, noise only happens at full left or right lock.
I am suffering from the exact same problem. That noise at full lock ain't pleasant! It's not belt noise. I also have a rebuilt power steering pump along with a rebuilt steering box and I've always assumed it was something inside the pump like an internal stop or other adjustment that was set incorrectly. Because like you said, everything functions perfectly otherwise.
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Old 06-30-2019, 02:31 PM
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Re: Power steering screech/grind noise at full lock

I'd suggest having your assistant work the steering wheel while you watch the pulley. Instinct tells me it won't be hard to spot.
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Old 06-30-2019, 02:48 PM
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Re: Power steering screech/grind noise at full lock

Originally Posted by sofakingdom View Post
I'd suggest having your assistant work the steering wheel ..
Cans of beer don't typically help out in that fashion...
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Old 06-30-2019, 03:10 PM
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Re: Power steering screech/grind noise at full lock

Originally Posted by Tibo View Post
I am suffering from the exact same problem. That noise at full lock ain't pleasant! It's not belt noise. I also have a rebuilt power steering pump along with a rebuilt steering box and I've always assumed it was something inside the pump like an internal stop or other adjustment that was set incorrectly. Because like you said, everything functions perfectly otherwise.
thank cheesus Iím not the only one.
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Old 06-30-2019, 03:17 PM
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Re: Power steering screech/grind noise at full lock

Originally Posted by sofakingdom View Post
I'd suggest having your assistant work the steering wheel while you watch the pulley. Instinct tells me it won't be hard to spot.
Iíve done this with several folks, I suppose next time Iíll break out the stethoscope and see if I can pin-point exactly where the noise is. Iím also entertaining the idea of a serpentine conversion in the future. Would you happen to know of any kits for this or is it a trial and error kind of job?
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Old 06-30-2019, 10:12 PM
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Re: Power steering screech/grind noise at full lock

Originally Posted by sofakingdom View Post
I'd suggest having your assistant work the steering wheel while you watch the pulley. Instinct tells me it won't be hard to spot.
To add to what Sofa said, you MIGHT also be able to connect your timing light and aim the flash at the PS pulley in an attempt to "stop motion" while a helper cranks the steering wheel to full lock. Just be REALLY CAREFUL because the belts and pulleys ARE still rotating!
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