Quote:
Originally Posted by Zulfiqar
Open the reservoir cap and see the fluid with engine running, if its like a whirlpool in there, the reservoir filter is broken - the turbulence of the fluid is causing this noise.
replacing the reservoir tank will fix this.
mostly the failing part on this system is the lathe cut O ring that seals the tank to the pump. If that leaks the result is usually noise as the fluid is aerated as its being pulled into the pump.
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Quote:
Originally Posted by Diseasel300
This is an engine driven pump right? If so, the noise should be changing with engine RPM and you should be able to change the "groan" by moving the steering wheel back and forth. If it doesn't change with engine RPM, it isn't the P/S pump...
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There's no churning, it is just quiet in the reservoir.
A poked around with a stethoscope and the only place I could hear he distinct sound was after touching the back of the p/s pump. Is it possible for the unit to go bad while in the reservoir the fluid acts normal, w/o whirlpool effect? On the other hand I am new to MB, a diy weekend wrencher and I just acquired a steth. So I am getting familiar with it. How do I check spinning units such as pulleys, etc?
The whining sound is more noticeable after a cold start, eases some after the car warms up, it doesn't go away oh no, it's there and noticeable. It only changes slightly when u turn the steering wheel, but it's still noticeable present. What else can I do to establish the source?
Quote:
Originally Posted by sixto
Does the whine persist if you momentarily run the engine without the serpentine belt?
Sixto
98 E320s sedan and wagon
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I haven't removed the s/belt. Is this a sure way of establishing the source is psp? I can do this on Sunday.
I also noticed a ticking sound every so often that then goes away from the little unit circled below. Is this normal and what is this unit, what's it for?
01-26-2018, 07:56 AM
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