Weird sound not sure if that’s the steering wheel bump?
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Senior Member
Joined: May 2016
Posts: 739
Thread Starter
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Senior Member
Joined: May 2016
Posts: 739
I just bled it again and same thing it run smooth no problem. Then all the sudden it come back, if I turned off the car and waited few mins and turn it back on it goes away then iit come back
Senior Member
Joined: Feb 2016
Posts: 121
When you replaced the pump, did you replace both the reservoir and the pump (both brand new out of the box), or simply just the pump (and used the old reservoir)?
If you used the old reservoir, did you happen to flush it before reinstalling it onto the new pump?
Couple of things come to mind:
1) If you reused the old reservoir, especially if you didn’t flush it, there could be some type of blockage in the reservoir filter that is restricting the flow of power steering fluid from the reservoir to the pump.
2) even if you did flush it, if you used the old reservoir, there could potentially be a leak from where the reservoir meets the pump, which could cause air to be sucked into the pump. It may not be large enough to be visible to the naked eye, or it could potentially be dripping on the under armor/suspension/etc. to where you may not see it right off the bat.
3) it’s possible you may have gotten a bad pump (reservoir completely aside) which is allowing air to be sucked in (even if just a very small, small amount).
Either way, it’s possible you could just need to bleed the system more (which it sounds like you’ve already done it a lot), but it’s also possible there could be something inducing air into the system as a whole. I just replaced the PS Pump on my Alpha, as well as a hose and I didn’t bleed the system nearly as much as you’re mentioning, and it didn’t take very long for the pump to get quiet, and stay quiet.
This is definitely not the answer you want to hear, but have you considered trying another new pump, as well as a brand new reservoir?
If you used the same reservoir, and didn’t flush it, at a minimum I would drain the system, take it off, and back flush the reservoir (plenty of info online how to do that), then re-install/refill, then try again.
If you used the old reservoir, did you happen to flush it before reinstalling it onto the new pump?
Couple of things come to mind:
1) If you reused the old reservoir, especially if you didn’t flush it, there could be some type of blockage in the reservoir filter that is restricting the flow of power steering fluid from the reservoir to the pump.
2) even if you did flush it, if you used the old reservoir, there could potentially be a leak from where the reservoir meets the pump, which could cause air to be sucked into the pump. It may not be large enough to be visible to the naked eye, or it could potentially be dripping on the under armor/suspension/etc. to where you may not see it right off the bat.
3) it’s possible you may have gotten a bad pump (reservoir completely aside) which is allowing air to be sucked in (even if just a very small, small amount).
Either way, it’s possible you could just need to bleed the system more (which it sounds like you’ve already done it a lot), but it’s also possible there could be something inducing air into the system as a whole. I just replaced the PS Pump on my Alpha, as well as a hose and I didn’t bleed the system nearly as much as you’re mentioning, and it didn’t take very long for the pump to get quiet, and stay quiet.
This is definitely not the answer you want to hear, but have you considered trying another new pump, as well as a brand new reservoir?
If you used the same reservoir, and didn’t flush it, at a minimum I would drain the system, take it off, and back flush the reservoir (plenty of info online how to do that), then re-install/refill, then try again.
Thread Starter
|
Senior Member
Joined: May 2016
Posts: 739
When you replaced the pump, did you replace both the reservoir and the pump (both brand new out of the box), or simply just the pump (and used the old reservoir)?
If you used the old reservoir, did you happen to flush it before reinstalling it onto the new pump?
Couple of things come to mind:
1) If you reused the old reservoir, especially if you didn’t flush it, there could be some type of blockage in the reservoir filter that is restricting the flow of power steering fluid from the reservoir to the pump.
2) even if you did flush it, if you used the old reservoir, there could potentially be a leak from where the reservoir meets the pump, which could cause air to be sucked into the pump. It may not be large enough to be visible to the naked eye, or it could potentially be dripping on the under armor/suspension/etc. to where you may not see it right off the bat.
3) it’s possible you may have gotten a bad pump (reservoir completely aside) which is allowing air to be sucked in (even if just a very small, small amount).
Either way, it’s possible you could just need to bleed the system more (which it sounds like you’ve already done it a lot), but it’s also possible there could be something inducing air into the system as a whole. I just replaced the PS Pump on my Alpha, as well as a hose and I didn’t bleed the system nearly as much as you’re mentioning, and it didn’t take very long for the pump to get quiet, and stay quiet.
This is definitely not the answer you want to hear, but have you considered trying another new pump, as well as a brand new reservoir?
If you used the same reservoir, and didn’t flush it, at a minimum I would drain the system, take it off, and back flush the reservoir (plenty of info online how to do that), then re-install/refill, then try again.
If you used the old reservoir, did you happen to flush it before reinstalling it onto the new pump?
Couple of things come to mind:
1) If you reused the old reservoir, especially if you didn’t flush it, there could be some type of blockage in the reservoir filter that is restricting the flow of power steering fluid from the reservoir to the pump.
2) even if you did flush it, if you used the old reservoir, there could potentially be a leak from where the reservoir meets the pump, which could cause air to be sucked into the pump. It may not be large enough to be visible to the naked eye, or it could potentially be dripping on the under armor/suspension/etc. to where you may not see it right off the bat.
3) it’s possible you may have gotten a bad pump (reservoir completely aside) which is allowing air to be sucked in (even if just a very small, small amount).
Either way, it’s possible you could just need to bleed the system more (which it sounds like you’ve already done it a lot), but it’s also possible there could be something inducing air into the system as a whole. I just replaced the PS Pump on my Alpha, as well as a hose and I didn’t bleed the system nearly as much as you’re mentioning, and it didn’t take very long for the pump to get quiet, and stay quiet.
This is definitely not the answer you want to hear, but have you considered trying another new pump, as well as a brand new reservoir?
If you used the same reservoir, and didn’t flush it, at a minimum I would drain the system, take it off, and back flush the reservoir (plenty of info online how to do that), then re-install/refill, then try again.
I used the old reservoir but I did flush the entire system what’s weird is when I start the car it quiet and then I drive it’s quiet and then all the sudden start to happen I am running out of ideas I can try to flush it one more time and see if that will make some magic happen
Senior Member
Joined: Feb 2016
Posts: 121
Just for clarification, I would flush the reservoir specifically (not just drain the old fluid, and replace with new).
I would drain the entire system of power steering fluid, remove the reservoir from the pump, then specifically back flush it with brake parts cleaner/compressed air/etc. (again, multiple methods to do this online).
afterwards, I would re-install everything, then refill, bleed, and try again.
I would drain the entire system of power steering fluid, remove the reservoir from the pump, then specifically back flush it with brake parts cleaner/compressed air/etc. (again, multiple methods to do this online).
afterwards, I would re-install everything, then refill, bleed, and try again.
Thread Starter
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Senior Member
Joined: May 2016
Posts: 739
Just for clarification, I would flush the reservoir specifically (not just drain the old fluid, and replace with new).
I would drain the entire system of power steering fluid, remove the reservoir from the pump, then specifically back flush it with brake parts cleaner/compressed air/etc. (again, multiple methods to do this online).
afterwards, I would re-install everything, then refill, bleed, and try again.
I would drain the entire system of power steering fluid, remove the reservoir from the pump, then specifically back flush it with brake parts cleaner/compressed air/etc. (again, multiple methods to do this online).
afterwards, I would re-install everything, then refill, bleed, and try again.
Senior Member
Joined: Apr 2019
Posts: 3,192
From: BX NY North East
the resivour is a filter not just a regular fluid resivour.
a member tore one down on the forum and had posted pictures.
https://www.hummerforums.com/forum/h...ty-pump-44996/
a member tore one down on the forum and had posted pictures.
https://www.hummerforums.com/forum/h...ty-pump-44996/
Last edited by bronxteck; Mar 4, 2025 at 09:30 AM.
Thread Starter
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Senior Member
Joined: May 2016
Posts: 739
Update
So I did a warranty replacement for the pump just to be safe. I got a brand new one. I flushed the system twice before installing the new one and I sprayed the reservoir with brake cleaner and shook the hell out of it until it’s pure clean . I replaced all the gaskets include on all the lines and the reservoir . I installed the new pump and did exactly what yall told me for bleeding. So far so good not a single whine or sound! It didn’t even sound from the getco so I will drive it more and keep you guys updated
