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Power steering noise

Eric.S.

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Hello everyone;) I was finally able to pick up my grenadier yesterday🥳 Unfortunately, I noticed at home that my power steering makes a strange noise. I think it's not a normal noise, or? The filling level in the container was at maximum with the engine warm but switched off. The German instructions do not say exactly in which condition the oil should be checked. Does anyone have an idea? I tried to post a video but I always see the file is too big (7mb)
Thank you;)
 

fredp45069

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I am struggling with this as mine certainly makes the same defining sound and yet so do many other Grenadiers I've seen at my dealer. The dealer did take the issue up with Ineos who declared it 'normal'. I can't think of another vehicle I have heard with such a loud squeal from the power steering pump. It may be 'normal' for Ineos but I am fairly sure that does not make it 'right'. I would replace the pump out of pocket if I believed it would eliminate or even decrease the squeal.
Dealer: “The power steering pump(GRA-4B23-038380) you're requesting is $2,275.64 + tax.
This would have to be ordered from the UK and may take 45-60 days transit time.”
 
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emax

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certainly makes the same defining sound and yet so do many other Grenadiers I've seen
If that is the case, then it is obviously a series defect in a poorly designed or built oil pump.

And you can't get rid of it by simply calling it "normal."
 
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emax

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Dealer: “The power steering pump(GRA-4B23-038380) you're requesting is $2,275.64 + tax.
This would have to be ordered from the UK and may take 45-60 days transit time.”
If it is a series defect, ordering a new oil pump that is also defective will not help.
 
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bradb622

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Wow. That’s an expensive pump. I withdraw my solution of simply buying another. I get that some people view this as ‘normal’ or that it doesn’t bother everyone. At the same time, others are reporting no noise or minimal noise - so there’s an inconsistency here. I think it’s fair as Grenadier owners to ask why.
 
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Skydance

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Has anyone had the steering fluid completely changed or had the system aired? Rather than the dealer keeps saying it’s normal. How do you let out the trapped air? My dealer hasn’t even attempted this.
 
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Cheshire cat

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Probably a silly question. For those that are suffering with this noise. Have you tried a general search on google? Hard to believe this would be unique to Ineos only. Possibly someone else has the answer ie, bleeding, oil change, belts, whatever! Google might at least point to some form of way forward.
 
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Skydance

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Probably a silly question. For those that are suffering with this noise. Have you tried a general search on google? Hard to believe this would be unique to Ineos only. Possibly someone else has the answer ie, bleeding, oil change, belts, whatever! Google might at least point to some form of way forward.
Currently searching and educating myself as we speak, I’m not a mechanic. I just find it weird that not everyone has it and yet dealers says it normal. I’ve driven a few courtesy vehicles and all have it.

Don’t you have the squeeling noise like in the video above particularly when it’s stationary?
 
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Cheshire cat

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Hi Skydance
Not that I have ever noticed. Where are you based? Are there any other members near you for a quick comparison?
 
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Listening to some of the videos the noise is very common with hydraulic systems running gear pumps both electrically driven pumps and engine driven. Reading the specifications from an earlier post, the pump is a brushless DC motor, likely with digital control, and a gear hydraulic pump. These pumps will be operating at near full relief pressure and can produce the most noise during steering cycle while the car is moving at its slowest and will go into bypass, over relief or electronically controlled pump derate at full lock. The pressure required to operate the power steer and noise will decrease controlled electronically as the car increases speed and require less steering assistance. Nearly every engine belt driven power steer system in cars use a vane type pump with a directly mounted reservoir which is generally quieter then a gear pump and a remote reservoir . There will be tolerances in the pump and the relief valving and the steer box valving so there is going to be some variance in pressures from vehicle to vehicle. A slight pressure variance in a hydraulic system from relief and bypass adjustments can be enough to increase pump or valve noise. Being a simple vehicle power steer system these valves will be non adjustable and likely to be very basic in design ie not temperature compensated or pilot controlled. Other areas the pump causing excessive pump noise is reservoir level too low, air being pulled in on the pump through the suction hose or reservoir joints due bad or lose connection, excessive turbulence in the reservoir from returning oil especially with low oil or and in some instances not enough reservoir pressure to maintain good pump fluid delivery under some operating conditions.
 
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Skydance

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Listening to some of the videos the noise is very common with hydraulic systems running gear pumps both electrically driven pumps and engine driven. Reading the specifications from an earlier post, the pump is a brushless DC motor, likely with digital control, and a gear hydraulic pump. These pumps will be operating at near full relief pressure and can produce the most noise during steering cycle while the car is moving at its slowest and will go into bypass, over relief or electronically controlled pump derate at full lock. The pressure required to operate the power steer and noise will decrease controlled electronically as the car increases speed and require less steering assistance. Nearly every engine belt driven power steer system in cars use a vane type pump with a directly mounted reservoir which is generally quieter then a gear pump and a remote reservoir . There will be tolerances in the pump and the relief valving and the steer box valving so there is going to be some variance in pressures from vehicle to vehicle. A slight pressure variance in a hydraulic system from relief and bypass adjustments can be enough to increase pump or valve noise. Being a simple vehicle power steer system these valves will be non adjustable and likely to be very basic in design ie not temperature compensated or pilot controlled. Other areas the pump causing excessive pump noise is reservoir level too low, air being pulled in on the pump through the suction hose or reservoir joints due bad or lose connection, excessive turbulence in the reservoir from returning oil especially with low oil or and in some instances not enough reservoir pressure to maintain good pump fluid delivery under some operating conditions.
Thanks for the detailed explanation.
 
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