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#1 |
Registered User
Join Date: Jan 2011
Location: Redmond, OR
Posts: 759
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Power Steering Noise
OK, my question is on the PS system. It works well, but often times when going around corners, it will let out a shrieking noise. Nothing felt through the wheel, but just a loud screaming noise.
While I like to see people looking at my truck, I don't necessarily like it for this reason. I have done the standard bleeding (slowly turning lock to lock), both with the engine off and running. I changed the belts, retightened them, and still have the problem. Any suggestions? Thanks
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68 Chev C20- son has it now 83 K20 - bought from son 70 C20 - in progress Last edited by dmack91; 05-19-2011 at 02:50 AM. |
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#2 |
Laid Back
![]() Join Date: Apr 2010
Location: mcloud ok
Posts: 2,658
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Re: Power Steering Noise
Most of the time it's the belt but there is a good chance that it's the bearings in the pump
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72 chevy swb Direct dealers for.. Vintage Air, Porterbuilt, Billet Specialties,Budnik wheels ,eddie motorsports, raceline wheels, intro wheels, Dakota Digital, precision, unisteer, Trimparts, and many many more... Laid Back Recreations.. Full restoration shop and full paint and body.. Kyle http://67-72chevytrucks.com/vboard/s...d.php?t=574629 |
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#3 |
Senior Member
![]() Join Date: Nov 2007
Location: New Blaine, Arkansas
Posts: 751
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Re: Power Steering Noise
Before you start buying parts, pull out the old fluid, replace with Lucas power steering fluid/treatment. This stuff works wonders!!
Tim |
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#4 |
Has more rust than truck...
Join Date: Apr 2005
Location: Ivanhoe, MN
Posts: 2,421
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Re: Power Steering Noise
Used that on my $150 grand am, worked great!
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#5 |
Registered User
Join Date: Jan 2011
Location: Redmond, OR
Posts: 759
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Re: Power Steering Noise
I did a full fluid flush earlier, but with no improvement (wasn't Lucas though).
Thanks for the ideas.
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68 Chev C20- son has it now 83 K20 - bought from son 70 C20 - in progress Last edited by dmack91; 05-20-2011 at 03:17 AM. |
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#6 |
Senior Member
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Location: New Blaine, Arkansas
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Re: Power Steering Noise
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#7 |
~Rest In Peace~
Join Date: May 2005
Location: CALIFORNIA NOR CAL
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Re: Power Steering Noise
OK I'm taking it its got clean new fluid in the reservoir , was the old fluid burnt and black in color ? ,im thinking its air bubble in the pump ,try bleeding the p/s ,jack up the front tires off the ground ,start the engine let idle and turn the steering wheel stop to stop back and forth ,have someone look in the reservoir to see if foam or air bubbles coming to the top .other than that the pump might be just bad on high pressure side
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#8 |
Account Suspended
Join Date: Jul 2006
Location: DFW
Posts: 1,427
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Re: Power Steering Noise
Does it do it sitting still turning the wheel?
I'd guess the belt is loose, or glazed, as already mentioned. I'm missing how magic fluid will stop belt squeal... ![]() |
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#9 |
Registered User
Join Date: Jan 2011
Location: Redmond, OR
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Re: Power Steering Noise
New fluid, new belts - tight, done the front jacked up/turn wheels several times with no luck. Old fluid wasn't black, just a bit dark.
Have seen lots of tiny bubbles at times, but have done the bleeding many times.
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68 Chev C20- son has it now 83 K20 - bought from son 70 C20 - in progress |
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#10 |
Project Junkie! Fishing Poor!!
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Location: Olympia,Wa. 98512
Posts: 10,770
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Re: Power Steering Noise
If you see lots of tiny bubbles you need to let them settle out befor adding new fluid and turning your wheels. Once they settle out add more fluid, then with the front wheels off the ground start the truck and run the wheels all the way right and then all the way left then shut the truck down. Check for bubble in the fluid. If there is still bubbles, then once the bubbles settle out, repeat the process. I do not believe this to be your problem though, because you discribe the problem to be a shreak not a whine. Shreaking is the belt slipping on the pullys, whining is low fluid or bubbles in the fluid.
I would pull the belt, and dress the pullies with emory cloth to get them to bite the belt better. I should ask are you turning the wheel all the way either direction? If so, many times the belt will shreak once you come up against the steering stops. WES
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#11 |
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Join Date: Jan 2011
Location: Redmond, OR
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Re: Power Steering Noise
Thanks WES for the suggestion. I will try dressing the pully next. As far as the screech, it doesn't usually happen when static (stopped), so it is not when the wheel is turned to the stops. Usually when going around a corner.
Thanks again all.
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68 Chev C20- son has it now 83 K20 - bought from son 70 C20 - in progress |
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#12 |
Project Junkie! Fishing Poor!!
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Re: Power Steering Noise
Another thing to consider is your front end alignment. If your front end is out of alignment the tires will squeel going around corners. WES
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#13 |
Senior Member
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Location: New Blaine, Arkansas
Posts: 751
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Re: Power Steering Noise
You must believe in the magic fluid Grasshopper! With all that he has done, sounds like an internal problem. The Lucas will free up sticky valves and condition inside the system. I have seen it work wonders.
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#14 | |
Project Junkie! Fishing Poor!!
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Re: Power Steering Noise
Quote:
Also transmission fluid should not be used as power steering fluid. The additives eat the seals in the steering gear. WES
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#15 |
Active Member
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Location: Centrally located between Houston, Austin and Waco. BCS area.
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Re: Power Steering Noise
re. loud squeeling: I'm with the belts/pulleys crowd on this one.
I'm not talking about the gearbox stop noise. But in all my experiences with the high frequency squeeling while turning it's always been either the belts, belt/pulley alignment or the metal contact surface on the pulleys being glazed or burnt. In another case I had a Tahoe that had the multi groove pulley that was so worn the new belts would slip on it. I would up having to get a new pulley. Check the belt alignment carefully. See if you can locate a cheap pump with the pulley at the junkyard to try. |
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#16 |
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Re: Power Steering Noise
Well thought to add this today due to same issues with growling going on. This would be just after replacing the steering gear with a new re-manfactured Cardone unit.
WES is spot on this, ran through the steering 20 turns, engine off. Burp, added fluid, did again for 20 turns. Then started engine and did the same. Just took it for a test drive and am very happy! Thanks Wes for your guidance on this, hope to meet you soon! |
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#17 |
Registered User
Join Date: Dec 2009
Location: Ste. Genevieve, MO
Posts: 526
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Re: Power Steering Noise
My truck does the exact same thing...but its not around corners, its when I turn the wheel all the way to the right or left, or when Ive just started my truck and try turning the wheel.
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#18 |
Project Junkie! Fishing Poor!!
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Re: Power Steering Noise
That sounds like a belt issue. Check to see if the belt is loose, there should only be about 1/4" of movement up and down. If more than that it would need tightening. If it still squeals then try a new belt and dress the pullies while you have it off. WES
Also make sure your belt matches your pullies. I have seen people use too narrow of belts and have the same problems.
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#19 |
Registered User
Join Date: Jun 2010
Location: Parkville, MD
Posts: 163
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Re: Power Steering Noise
I thought that PS noise at full lock was normal because the pump doesn't have a bypass.
Here, I found a link... http://67-72chevytrucks.com/vboard/s...d.php?t=418687 Last edited by PatrickGMC70; 05-20-2011 at 10:55 PM. |
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#20 |
~Rest In Peace~
Join Date: May 2005
Location: CALIFORNIA NOR CAL
Posts: 9,707
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Re: Power Steering Noise
that pump can be bad and is creating the air bubbles on its own ,
for belts use a soap bar on them if you think its squeals from them,but im sure its from the pump it self ,just my guess without looking at the truck
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is it fast ? it has a lighting bolt donut? B___H please, I can remove 90% of your so called "beauty" with a kleenex |
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