New pump and still powers steering noise

[bugman53]

I have a 1994 Jeep Grand Cherokee. The original power steering pump was making a "eeeerrrrr" nose then i would turn the wheel. So i bought a new pump and it still makes the same noise. When im sitting still i don’t hear it until i turn the wheel and the faster i turn the wheel the louder it gets. I flushed the system and have fresh powers steering fluid. I have STP power steering fluid in it right now.
The book says DO NOT RUN ATF IN THE POWER STEERING. and its louder when its cold.
Anything to quieten it down

 

[JohnBrowning]

First quite reading that book! Get a few quarts of ATF+4 at the local Dodge or Jeep dealership. It must be ATF+4 not ATF+3. Flush and refill the entire unit. Make sure the belt is in good condition and properly tensioned! Their is a TSB that went out a few years ago direction all DC dealerships to flush and replace all power steering fluid with ATF+4 when ever the P/S system required serviceing! It works better in hot and cold then the origanal power steering fluid.

P.S. Is the pump New,Reman or just new to this vechile?

 

[digitaldrifter91]

a while back i had that problem after flushing....burrrrrrrrrrrr sound would go on and it would sound like a whale.

i always wanted to flush out, but never had a oppertunity, recently i havent heard it..i tried to do it early in the morn and take a corner hard, but its not there any more...

so i guess my air got out of the system...but imma still change the fluid.

but yes flush out and steer a couple of times.

 

[JohnBrowning]

Good point digitaldrifter! You should purge the air. You remove the cap and turn the wheel back and forth to get fluid circulateing. Any air bubbles should rise to the surface and pop.

 

[bugman53]

Thanks. Im pretty sure all the air is out. Im not gettign any air bubbles in the fluid. Im going to try the ATF=4 and see how it goes.

The pump was a rebuilt one could it have been already worn out?(They dident have a new one)

 

[oilrecovery2003]

I know people are going to yell, but I would start with Maxlife steering fluid. Or Valvoline Synpower fluid. Then add Lucas Rack and Pinion leak stopper. You don't have to have a leak. Like all their products they make great preventive products.

 

[Grease is the word]

I had a screaming power steering pump on cold startups and groaning all the time on an '01 Grand Caravan 3.8L. I was very skeptical when I read the TSB to replace with ATF+4. I thought what could it hurt to do it before the pump. The TSB also says to replace the PS reservoir. I did that (about $20) and flushed the fluid with ATF+4.

The thing is quiet as it could ever be. No cold startup noise, no groaning... heaven.

 

[darrenc]

A little off topic, but....

I replaced the power steering unit on my 96 Grand Cherokee last year with a NAPA remanufactured unit and flushed and filled with Royal Purple power steering fluid. A couple months ago I added 2 oz of Auto-RX to the reservoir. During a two month period, my fluid went from bright red to brown. I couldn't believe the garbage the ARX was pulling out and suspending. Amazing. I've since refilled with Chevron Dexron III ATF. Pump sounds the same, but operates much better. These Chrysler units do seem to growl a bit. I don't think there is any harm though. In my experience, they seem to last around 100 K miles before they die.

 

[CelicaGT6]

Hey! My celica does that too! I had a leak on my high pressure line for a while and tried two bottles of lucas stop leak. I eventually replaced the line and refilled the system with redline ATF.

It still groans when cold which is kinda annoying. Any ideas why? I dont think there are any air bubbles in the system and the pump only has about 40,000 miles on it since it came with the new engine I swapped in last summer(engine is a 1997).

 

[Ray H]

Hyundai advises in their current owner manuals that a groaning sound in cold weather starts is normal - just a characteristic of cold, viscous fluid. By the way, merely turning the wheel lock-to-lock with the engine idling may NOT always purge the air from a power steering system. The churning fluid from a running pump may hold air in suspension by breaking the air into bubbles too small to rise. Some manufacturers advise to suspend the front wheels off the ground and rapidly turn the steering wheel lock-to-lock several times with the engine OFF as a means to purge the air from the system.