PS Pump Whine
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Joined: Oct 2017
Posts: 196
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2010 C63 AMG, 2015 GL450, 2018 GLS 550, 2021 GLS 450
PS Pump Whine
Fresh reservoir, fresh fluid, I’m still having a bit of a whine at startup, but it goes away after awhile.
Any suggestions before I replace the pump?
Any suggestions before I replace the pump?
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Joined: Aug 2011
Posts: 5,351
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From: Kitchener, ON
2010 C63 AMG
You can see if it's leaking visually. Pull the boots and inspect if it's not coming from any of the hoses. If nothing external it could be an internal leak.
EDIT: I misread. I thought you replaced the pump as well. If it's whining then going away it could be the vanes in the pump not making a seal right away.
EDIT: I misread. I thought you replaced the pump as well. If it's whining then going away it could be the vanes in the pump not making a seal right away.
Last edited by Jasonoff; Apr 6, 2023 at 04:16 PM.
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Joined: Feb 2015
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From: New Zealand
W204 C200, BMW E30 M3, 1980Gt Mini, Toyota Corona, KTM 200 EXC.
I don't think it will be the steering rack unless the fluid level is decreasing which means the fluid may be leaking in to the steering rack boot, or it may be a leaking hose somewhere.
For peace of mind a good look over the hoses in the system for dampness/leaks, cleaning and re-inspection as required.
Make sure the fluid level is correct before you start it up.
I think at this stage you need to be confident it is not belt noise or related to another pulley the belt drives, if you are 100% in that order a new pump.
For peace of mind a good look over the hoses in the system for dampness/leaks, cleaning and re-inspection as required.
Make sure the fluid level is correct before you start it up.
I think at this stage you need to be confident it is not belt noise or related to another pulley the belt drives, if you are 100% in that order a new pump.
