06goat75 Posted February 29, 2020 Report Share Posted February 29, 2020 More of just a vent than anything. Car has had a noisy power steering pump since I got it. No problem, kinda normal for these things. Finally got around to replacing it, AC Delco reman unit. Now it's louder than it was before! Did a bleed procedure, but gonna do it again tomorrow when I have time to tinker with it. Hopefully it just still has air in the system. Quote Link to comment Share on other sites More sharing options...
Psych0matt Posted March 1, 2020 Report Share Posted March 1, 2020 As many of these cars as I’ve had, I think every single one had a noisy ps pump, so much that I rarely notice any more. However, I’ve never had one that had any issues outside of the noise. Quote Link to comment Share on other sites More sharing options...
Psych0matt Posted March 1, 2020 Report Share Posted March 1, 2020 Double post Quote Link to comment Share on other sites More sharing options...
55trucker Posted March 1, 2020 Report Share Posted March 1, 2020 What did you pour in for p/s fluid? Quote Link to comment Share on other sites More sharing options...
06goat75 Posted March 2, 2020 Author Report Share Posted March 2, 2020 1 hour ago, 55trucker said: What did you pour in for p/s fluid? Prestone Quote Link to comment Share on other sites More sharing options...
55trucker Posted March 2, 2020 Report Share Posted March 2, 2020 LOL.......so there wasn't any residual trans fluid at all? Quote Link to comment Share on other sites More sharing options...
ron350 Posted March 2, 2020 Report Share Posted March 2, 2020 (edited) 06goat75 If you ever find out what makes PS pumps in mid 90’s GM cars whine please let us know. My factory PS pump whined so the dealership replaced 2 alternators just so they would not have to replace the PS pump. After the car was out of warranty I replaced the PS pump with a reman but it was louder. I finally came across a 97 LTZ in the salvage yard and grabbed that PS pump and most of my whine went away. The LTZ pump must have a lower pressure valve because the steering is less sensitive going down the road but feels weaker in a parking lot. Things that I have read about that can causes GM PS pump whine. Rack problems. Bad power steering pump reservoir cap. Air getting in to the system on the suction side. Fluid leak any where in the system. Wrong PS fluid. Edited March 2, 2020 by ron350 Quote Link to comment Share on other sites More sharing options...
06goat75 Posted March 2, 2020 Author Report Share Posted March 2, 2020 15 hours ago, 55trucker said: LOL.......so there wasn't any residual trans fluid at all? Trans fluid? Is that what it had in it from the factory? Quote Link to comment Share on other sites More sharing options...
55trucker Posted March 2, 2020 Report Share Posted March 2, 2020 No.....but seeing as you're not the original purchaser of the vehicle....you don't really know for sure what may have been poured into it. Quote Link to comment Share on other sites More sharing options...
06goat75 Posted March 2, 2020 Author Report Share Posted March 2, 2020 (edited) 48 minutes ago, 55trucker said: No.....but seeing as you're not the original purchaser of the vehicle....you don't really know for sure what may have been poured into it. Ahh, gotcha. It wouldn't surprise me one bit! After bleeding it, again, yesterday (still a few small bubbles), and driving it around today (got some new shoes for it!), I think I'm just gonna put the "old" pump back on, it was a bit quieter. Who knows, the "new" pump was a reman AC Delco unit from RA wholesale closeouts, so it might have been sitting in the warehouse for a decade, and the seals might be shot. Heck, there's a '94 Grand Prix GT in the local LKQ, maybe I'll stop by tomorrow and pull that one, see if it is any quieter. Good thing the pumps are easy and quick to swap out, just the bleeding procedure is a pain. Edited March 2, 2020 by 06goat75 Quote Link to comment Share on other sites More sharing options...
55trucker Posted March 2, 2020 Report Share Posted March 2, 2020 Well, it won't be the seals that are causing the whine, it could be the vanes as they spin inside the pump ring, or possibly the control valve is fluttering against the flow control spring. Go4DaMo 1 Quote Link to comment Share on other sites More sharing options...
06goat75 Posted March 2, 2020 Author Report Share Posted March 2, 2020 Put the original pump back in and it is quite a bit quieter now, even more so than before. Of course, a 30 minute job turned into a multi hour endeavor, with dropped tools, spilled power steering fluid all over, and a lost o-ring. I'll return this AC Delco one, drive it for a bit, and see what happens. Go4DaMo 1 Quote Link to comment Share on other sites More sharing options...
MemphisMan Posted March 3, 2020 Report Share Posted March 3, 2020 I'm definitely marking this thread. I'm going to be tackling a noisy PS pump in the near future on my '91 CS sedan. Quote Link to comment Share on other sites More sharing options...
rich_e777 Posted March 7, 2020 Report Share Posted March 7, 2020 (edited) Ive had some luck with the Lucas P/S fluid and conditioner. But whatever you add to the reservoir is only going to mix with the old fluid in the lines and R&P, perhaps a complete bleed and fluid replacement might help? I have this planned as I put the Vert back together and going to use nothing but the Lucas stuff. If it still whines after that well the pillar mounted door handles, leaky oil pump shafts and LIM gaskets are notoriously W-Body, so to shall be the b!@#$ing of the P/S pump. Edited March 7, 2020 by rich_e777 Go4DaMo 1 Quote Link to comment Share on other sites More sharing options...
Schurkey Posted March 14, 2020 Report Share Posted March 14, 2020 The noisy PS on my Trailblazer was instantly cured when I removed the original PS fluid, and installed GM "Cold Climate" PS fluid. https://www.amazon.com/ACDelco-10-5044-Climate-Power-Steering/dp/B007Q10PTW/ref=sr_1_2?crid=3OA5JDE3131IX&dchild=1&keywords=cold+climate+power+steering+fluid&qid=1584159184&sprefix=Cold+climate%2Caps%2C239&sr=8-2 Quote Link to comment Share on other sites More sharing options...
digitaloutsider Posted March 14, 2020 Report Share Posted March 14, 2020 Interesting! Every 3800 pump I've ever had, including the one on my Regal now, whines. I'll have to try that stuff. Go4DaMo 1 Quote Link to comment Share on other sites More sharing options...
crazyd Posted December 20, 2020 Report Share Posted December 20, 2020 I tried a full flush with the cold-climate ACDelco fluid after a pump replacement last month. No difference. Go4DaMo 1 Quote Link to comment Share on other sites More sharing options...
Go4DaMo Posted October 25, 2023 Report Share Posted October 25, 2023 Thanks for all the input. I started driving mine again after a couple years of storage. Power steering pump sounds cranky, but isn't losing fluid. I'll chalk it up to ambient LQ1 sounds! Quote Link to comment Share on other sites More sharing options...
crazyd Posted November 4, 2023 Report Share Posted November 4, 2023 Yeah I've been through three pumps and have never been able to get rid of the pump noise. I do the bleed thing and it either gets worse or stays the same. It's like owning a Ford. Quote Link to comment Share on other sites More sharing options...
Schurkey Posted November 5, 2023 Report Share Posted November 5, 2023 Sure it's the power steering? Might be worth pulling the serpentine belt and verifying the alternator, A/C, and water pump bearings aren't rough when the pulleys are spun. Quote Link to comment Share on other sites More sharing options...
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