kalilu

Hi, I bought a 03 s600 that had a bad engine. I replace the engine, the run fine but has a whining and humming noise coming from the driver side of the engine. I took out the belt to see if the engine is one making noise, it turn out to be fine. the noise get louder during test drive. can someone please help me if they have gone through similar problem.

Jack_88

Does turning the steering wheel have affect the whine? Any chance you could post a video so others can hear the sound? Is the sound proportional to engine rpm or is it more or less consistent?

mercy-me

If removing the belt the noise goes away then most likely ABC Tandem pump.

Bob

kraut56

...or the noise suppressor accumulator, which is located near the drivers's side. Whining/groaning is worst at 1500 RPM. Check the ABC and PS fluid carefully for level and condition.

Good luck!

kalilu

Thanks everyone, the sound do not change when I turn the wheel left or right. I have order pulsation Dampener and will change it, and see from there.

ZephTheChef

My car did that when I first bought it. It was the dampener. I'm sure that's your problem.

jny08ks

Hi,
My 03 s600 is whinning. Sounds like it is from abc pump that I put in rebuilt. And there's more pretty loud noise like diesel.But it is all quiet when belt is off. I changed belt,idler pulley, tensioner . Now what is dampener and noise suppressor accumulator? Thanks all.

ZephTheChef

Whining noise that changes with RPM can definitely be a bad pulse dampener. It's a round bulb filled with high pressure gas with a diaphragm in there that helps with pressure pulsations in the ABC system. It's located under the passenger side of the car near where the downpipe comes through.

I have no idea what would be making a noise like a diesel on the belt. Spin all the pulleys by hand with the belt off and see what feels rough/noisy.

mercy-me

Yes agree, ABC related except OP says driver side?

See attachments.

Good luck,

Bob

ZephTheChef

Yes, a bad damper won't cause noise at the damper, necessarily. It will juat fail to absorb the pump pulsation, probably causing noise at the pump.

kalilu

I did change the damper but the noise is there. any suggestion, this car is driving me crazy

jny08ks

Get a stethoscope at parts store and test the noisy part carefully. Don't touch anything turning. Put the scope on neck area of abc pump. and do same on others. There's many turning pulleys on front of s600 engine. You may able to narrow it down at list if not point out where the noise comes from. I'm still working on my 03 s600. I changed it with rebuilt one $450.
also changed broken end hose got it from dealer $380. 5quarts pentosin $60 ebay(dealer $30/qt). Labor $240. ABC works good . Only issue is whinning noise. Thanks all.

kalilu

I did change 3 small pulley and the a/c compressor. the noise same come both driver and passenger side. I attached a video on the sound. I also replace the pulsation dampener.

Jack_88

Video isn't working for me, I just see two pictures.

ZephTheChef

Same here. No vid.

AMG 17GT

ITS THE PULSATION DAMPER. lol

ZephTheChef

Which he clearly states he has already replaced.

Welwynnick

Did you try removing the auxiliary belt?

Nick

kalilu

I am having problem downloading the video. and the belt is serpentine belt, no auxiliary belt. I will change the ABC pump and see if that will solve the problem and where can I get the tool to do the RODEO testing? Thanks for the respond.

kraut56

go back to post #12 to isolate the source of the problem.
Don't just throw parts at it.

BTW: did you change the pump pulsation damper, or the damper on the front ABC valve block??

Good luck!

kalilu

I did put scope on the power steering pump and heard grinding noise. No sound from the front valve body. I do not know if this means anything.

Welwynnick

That's what I meant. Removing the auxiliary / serpentine / poly-V belt is quick, cheap and easy. It doesn't fix any problems in itself, but it's one of the first steps in trouble shooting.

Depending on whether the noise goes away, it helps to tell you where to look, by eliminating some of the possible causes. I didn't fully understand your first post.

Does the car make the noise at standstill in neutral, at standstill in gear, or when its running?

Does the noise change with car speed, or with engine speed (for example when changing gear)?

Nick

kalilu

Hi everyone, I did change the pump today, the noise is gone but the car is not raising up and the active body control park the car light is on and it is red. Is there anything that needs to be done after pump installation. All the CHF Hydraulic fluid was added.

Jack_88

Did you prime the pump?

kalilu

what do you mean prime the pump and how