Power steering noise

[Eric.S.]

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

 

[Nocrays]

Anyone made any progress with rectifying the noise? I've just hit 1000km and it's squealed from day 1. Dealer told me "they all do it and Ineos say it's a characteristic of the car". I pointed out they don't all do it as I've met other owners who don't have the problem. No fix available apparently.

That’s rubbish. I had a loaner for 6 months and the PS Pump was quiet as a mouse.

Then when my vehicle turned up it was squealing badly. After complaining about the unacceptable noise the pump was making the ps pump was replaced and now quiet.

Just my 2c.

 

[HereinDaRockies]

That’s rubbish. I had a loaner for 6 months and the PS Pump was quiet as a mouse.

Then when my vehicle turned up it was squealing badly. After complaining about the unacceptable noise the pump was making the ps pump was replaced and now quiet.

Just my 2c.

Yea it’s fking bs

 

[MileHigh]

Are there any in the US where people say they don’t make noise? My wife can hear me coming around the parking lot.
I will say that our 2024 Jeep Wrangler has a similar sound, but it’s not nearly as loud, which I wonder if it’s based on vehicle weight and pump strength. Of all the possible modifications up pump that didn’t squeal like a pig would be very high on my list if not at the top.

 

[HereinDaRockies]

Are there any in the US where people say they don’t make noise? My wife can hear me coming around the parking lot.
I will say that our 2024 Jeep Wrangler has a similar sound, but it’s not nearly as loud, which I wonder if it’s based on vehicle weight and pump strength. Of all the possible modifications up pump that didn’t squeal like a pig would be very high on my list if not at the top.

Have seen multiple us 2024 model (don’t know the build date) with VERY reasonable whine - meaning you don’t hear it if you were not paying attention to listen for it.

We have a 2025 guy saying his PS whines. Don’t know if it surpasses the subjective threshold I laid out above

 

[DenisM]

They all do squeal to a certain degree. Some louder than others. Only time it doesn’t squeal is a 0 degree steering angle (in the straight position) when it’s not on any load.

Well, I opened the bonnet and listened intently including with a stethoscope... quiet hum from steering pump with stethoscope but inaudible over normal (diesel) engine chatter without. No difference in noise when under load.
I'm wondering if the squealing pumps are actually cavitating because the the system has never been properly purged of air....
Currently have 14,000 km on the odo.

 

[Tom109]

I'm wondering if the squealing pumps are actually cavitating because the the system has never been properly purged of air....
Currently have 14,000 km on the odo.

Mine is loud. Brought it to the dealer’s attention before I scheduled my first service. The tech said mine was actually quieter than most (!) and that the bled the system anyway with no change. Sounded exactly the same.

 

[Skydance]

Well, I opened the bonnet and listened intently including with a stethoscope... quiet hum from steering pump with stethoscope but inaudible over normal (diesel) engine chatter without. No difference in noise when under load.
I'm wondering if the squealing pumps are actually cavitating because the the system has never been properly purged of air....
Currently have 14,000 km on the odo.

Possibly. It’s only recently in the sunshine I open the windows to drive and can hear it squealing. Usually windows closed and I can’t hear a thing. All the Grenadier YouTube videos you can hear it and It must be rare the ones that don’t. I can say it’s got quieter over the last 2 and 1/2 years since I’ve had it.

Question is what has Ineos done to answer why some do and some don’t? Should they totally drained out the steering fluid and vacuum refill to eliminate the air.

 

[Skydance]

Alright folks, done some DIY research and been doing some tinkering. I have tried this as my power steering reservoir is over filled and there is excess weeping of oil. On the cap, there is a stalk with min and max. I’ve syringed out (or use a turkey baster) the excess fluid to under max on a level surface, when engine is cold, using a paper towel to wipe down in between each measurements.

I can definitely hear less noise and sometimes virtually no noise, which is a result. It also explains why some have it and some don’t. Just depends on whether there is trapped air present or if the coolant is over filled. You can only get an accurate measurement on a level surface and cold engine.

Someone please try it and let me know. Maybe we can put the whining power steering to bed.

 

[HereinDaRockies]

Alright folks, done some DIY research and been doing some tinkering. I have tried this as my power steering reservoir is over filled and there is excess weeping of oil. On the cap, there is a stalk with min and max. I’ve syringed out (or use a turkey baster) the excess fluid to under max on a level surface, when engine is cold, using a paper towel to wipe down in between each measurements.

I can definitely hear less noise and sometimes virtually no noise, which is a result. It also explains why some have it and some don’t. Just depends on whether there is trapped air present or if the coolant is over filled. You can only get an accurate measurement on a level surface and cold engine.

Someone please try it and let me know. Maybe we can put the whining power steering to bed.

So you went from annoying noise that you can hear from driver seat(with windows open), to now nonaudible sound ?

 

[Zimm]

Are there any in the US where people say they don’t make noise? My wife can hear me coming around the parking lot.
I will say that our 2024 Jeep Wrangler has a similar sound, but it’s not nearly as loud, which I wonder if it’s based on vehicle weight and pump strength. Of all the possible modifications up pump that didn’t squeal like a pig would be very high on my list if not at the top.

Mine made absolutely no noise last year. I noticed this spring the first time I had the window down and was up against the house it now has a slight whine. being as I never touched anything, and the PS pump has leached like most indicating a full load of fluid, my experience doesn't really portend the existence of a "fix", such as air from the factory. If Ineos's supplier did a batch production based on pre order counts (which I don't think they have hit yet), they are going to use them all up before a redesign hits the market. If it's more JIT, someone still needs to bring the situation up to the supplier and a fix needs to be designed, and existing production isn't going to cease, as they can't sell a car without one. Either way, if model '25's are still howling, your hope is pinned on model '26... then MAYBE you have a TSB situation whereby Ineos replaces the loud ones, and the rest of hope theirs doesn't degrade after the warranty is up.

At least thats what Zimm's crystal ball is showing... I also have the world ending in 72 days when yellowstone blows its top, so there does appear to be a conflict. I'll shake it again later.

 

[HereinDaRockies]

Mine made absolutely no noise last year. I noticed this spring the first time I had the window down and was up against the house it now has a slight whine. being as I never touched anything, and the PS pump has leached like most indicating a full load of fluid, my experience doesn't really portend the existence of a "fix", such as air from the factory. If Ineos's supplier did a batch production based on pre order counts (which I don't think they have hit yet), they are going to use them all up before a redesign hits the market. If it's more JIT, someone still needs to bring the situation up to the supplier and a fix needs to be designed, and existing production isn't going to cease, as they can't sell a car without one. Either way, if model '25's are still howling, your hope is pinned on model '26... then MAYBE you have a TSB situation whereby Ineos replaces the loud ones, and the rest of hope theirs doesn't degrade after the warranty is up.

At least thats what Zimm's crystal ball is showing... I also have the world ending in 72 days when yellowstone blows its top, so there does appear to be a conflict. I'll shake it again later.

lol why is it only Ineos with the inept suppliers for trivial parts - ps pump that doesn’t scream to the world, hvac system that can output air of a certain temperature.

They are not building a rocket ship.

 

[Skydance]

So you went from annoying noise that you can hear from driver seat(with windows open), to now nonaudible sound ?

Yes. Faintly audible. Give it try, it’s very easy.

 

[ADVAW8S]

Sticking with @Skydance I too have begun exploring the noise issue. I started via finding any information written by any manufacturer. Link is a piece written by ZF. One thing I found interesting is the stress on the pump helps dictate the noise level. When turning the wheel stationary, one should expect louder response versus driving down the street and turning the wheel. Speculation, I wonder if larger tires with a larger contact patch might require a higher pumping force which then makes a louder noise.

Noise Emission on Electro-Hydraulic Steering Systems

Electrically powered hydraulic steering (EPHS) is an intermediate technology on the path to fully electric steering (EPS – electrically powered steering).

aftermarket.zf.com

 

[HereinDaRockies]

Sticking with @Skydance I too have begun exploring the noise issue. I started via finding any information written by any manufacturer. Link is a piece written by ZF. One thing I found interesting is the stress on the pump helps dictate the noise level. When turning the wheel stationary, one should expect louder response versus driving down the street and turning the wheel. Speculation, I wonder if larger tires with a larger contact patch might require a higher pumping force which then makes a louder noise.

Noise Emission on Electro-Hydraulic Steering Systems

Electrically powered hydraulic steering (EPHS) is an intermediate technology on the path to fully electric steering (EPS – electrically powered steering).

aftermarket.zf.com

That factor is not at play. While the vehicle is in park. A gentle nudge on the steering wheel kicks off the pump and the squeal is loud as hell on many grenadiers. No additional movement of the steering wheel is given. Squeal persists for 5 seconds, until it times out into idle mode

 

[singlefin]

Mine squeals at either level min/max and still does with the 202 fluid. I can’t tell if the sound has actually decreased but still audible. I really only hear it in my garage or next to a building but try to pay no mind until there is a solution, which I’m doubtful will happen.

Replace the o-ring on the cap if it’s leaking.

 

[Skydance]

Mine squeals at either level min/max and still does with the 202 fluid. I can’t tell if the sound has actually decreased but still audible. I really only hear it in my garage or next to a building but try to pay no mind until there is a solution, which I’m doubtful will happen.

Replace the o-ring on the cap if it’s leaking.

It’s an improvement definitely. The weeping is coming out of the pin hole in the cap (air valve). It’s weeping because it’s been over filled and each Grenadier is different to one another in terms of how loud it is.

 

[Zimm]

Sticking with @Skydance I too have begun exploring the noise issue. I started via finding any information written by any manufacturer. Link is a piece written by ZF. One thing I found interesting is the stress on the pump helps dictate the noise level. When turning the wheel stationary, one should expect louder response versus driving down the street and turning the wheel. Speculation, I wonder if larger tires with a larger contact patch might require a higher pumping force which then makes a louder noise.

Noise Emission on Electro-Hydraulic Steering Systems

Electrically powered hydraulic steering (EPHS) is an intermediate technology on the path to fully electric steering (EPS – electrically powered steering).

aftermarket.zf.com

If that were the case, changing the wheel offset to push the tire outward moving the center of rotation, would also cause more work/noise.