DIY Power Steering Pump replacement - Mercedes-Benz Forum
 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 11-07-2012, 04:37 PM Thread Starter
BenzWorld Member
 
Date registered: Jun 2010
Vehicle: '07 R320
Location: Virginia
Posts: 148
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
Arrow DIY Power Steering Pump replacement

I have a 2007 R320 CDI. I have no good words to say for this car.
In the latest spate of my woes with this car, the power steering pump has died at around 80,000 miles. I am attempting to replace the pump myself. This thread will be a good guide for anyone who has the same issue.

Problem:
One fine day the power steering pump {PSP} started making noise. I opened the hood and noticed that the PS pulley was vibrating from side to side with the engine running. I gingerly drove the car back home.

Next day when I started the car and looked into the engine compartment I saw that the PSP had started spewing out oil like crazy. I had lost all PS assist. Oh well!

I looked at the forums and read all the threads related to PSP problems. Here they are:
Anyone have the power steering leak? - MBWorld.org Forums
https://www.benzworld.org/forums/w163...g-pump-11.html
https://www.benzworld.org/forums/w163...-please-2.html
https://www.benzworld.org/forums/w251...ing-fluid.html
https://www.benzworld.org/forums/w163...reservoir.html

Diagnosis:
The general consensus is to check the oil reservoir and connections for leaks first. Many people are reporting that this is a common issue and replacing the reservoir usually solves the issue.

Hoping for the best I removed the reservoir and looked at the hoses. They look pretty tight. No leaks from there. Then I took out the serpentine belt and got the bad news. The pulley of the PSP can be easily rocked left-right and twisted clockwise and anti-clockwise, making a clacking noise. It seems like something inside the PSP has been broken. Maybe the bearings are shot or something.

Replacement part:
I read that it is best to get a new OEM PSP. The remanufactured ones are noisy.

Well, I called around for a new or rebuilt PSP
MB Alexandria, VA dealer
$861 new, no remanufactured available

Carsteering.com
1-800-399-7845 [they did not pick up the phone and few times I called and waited up to 10 minutes..... more about this below]
$495 at their website, new OEM

German Star
800-377-6598
Called them and they say they don’t carry it

CarPartsWarehouse
2007*Mercedes Benz*R320*Steering Pump from Car Parts Warehouse | Add to Cart
$495 new OEM

AutopartsShop
Power Steering Pump Cardone 21-123
$303 remanufactured {$50 core charge} but not in stock.

O’Reilly
Cardone Remanufactured 21-123 - Power Steering Pump | O'Reilly Auto Parts
Cardone brand reman pump
$303 but maybe not available

Ebay
Various vendors are selling a reman. PSP for around $350



Is there any other vendor I should call?

I have the official Star Service DVD and am pretty knowledgeable, technically. I think this should be an easy replacement. The only thing which worries me is the filter inside the reservoir. Maybe I should look inside it. I have an inspection camera which may do the job.

Does anyone have any tips for a DIY replacement?

Last edited by rajdude; 11-07-2012 at 05:02 PM. Reason: more info
rajdude is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 11-07-2012, 05:06 PM Thread Starter
BenzWorld Member
 
Date registered: Jun 2010
Vehicle: '07 R320
Location: Virginia
Posts: 148
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
ok so I was able to get someone on the phone from carsteering.com today. I talked to Johnny there. He does not have the part listed online in stock. He says that the mercedes dealers bought all his stock!

He can get be a rebuilt one for 350 plus a 100 dollar core charge. Free shipping.

I am thinking about it.

350 for a rebuilt vs 500 for a new one is a no brainer to me. However the new is not available and he says he does not know when he will get it in stock.

Now calling the carpartswarehouse guys. Interestingly they have a video about the PSP I need!
rajdude is offline  
post #3 of 8 (permalink) Old 11-07-2012, 05:14 PM Thread Starter
BenzWorld Member
 
Date registered: Jun 2010
Vehicle: '07 R320
Location: Virginia
Posts: 148
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
oh wow...just got off the phone with CarPartsWarehouse guy . He sounded exactly like Johnny from Carsteering.com. However he said his name was Henry.

He had the same situation as Carsteering.com...new not available although the site says yes. He does have one last remanufactured for 395 + 50 core. He also said that dealers bought stuff from him and now are selling them for over 800.

I think all these sites are just affiliates for some "mothership website".
Interesting!
rajdude is offline  
Sponsored Links
Advertisement
 
post #4 of 8 (permalink) Old 11-13-2012, 03:20 PM Thread Starter
BenzWorld Member
 
Date registered: Jun 2010
Vehicle: '07 R320
Location: Virginia
Posts: 148
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
oh wow...no responses?
I guess not too many DIYers frequent this section of benzworld.

Well, I am still trying to find a reasonable source for the PSP. I did find out that the PSP in my R320 is slightly different than the one in R350. The mercedes part numbers are slightly different.

R320 CDI 4Matic : Power steering pump p/n 004 466 83 01


I am going to look inside the reservoir and see if the filter mesh is intact. Otherwise I will have to replace it.
rajdude is offline  
post #5 of 8 (permalink) Old 11-13-2012, 07:25 PM Thread Starter
BenzWorld Member
 
Date registered: Jun 2010
Vehicle: '07 R320
Location: Virginia
Posts: 148
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
update:
I tried to look inside using my camera but was unable to do so. Then I checked the threads which complain about the mesh filter inside... looks like the problematic mesh filter is inside a ML320's reservoir. It may not be inside a R320's reservoir...I am only judging by its shape. The R320's reservoir is very tapered compared to the other one which is boxy.

Anyway, I have just placed the order for a new PSP and some fluid at ecs tuning...for a total of around $550. I talked to them this afternoon. They said that it will be a genuine PSP , exactly the same as the dealer sells. He said it will be in a genuine MB box. He did say it will take them around a week to order and get it + 2-3 days to get it to Virginia.

Lets see...my fingers are crossed!
rajdude is offline  
post #6 of 8 (permalink) Old 06-15-2014, 02:33 PM
BenzWorld Junior Member
 
Date registered: Jun 2014
Vehicle: 2012 GL350 Bluetec, 2012 E350 4Matic, 2006 R350 4Matic
Location: CT USA
Posts: 25
Mentioned: 0 Post(s)
Quoted: 3 Post(s)
Replacing my tank and o-ring tomorrow. How does the clip on the bigger hose come off?
Thanks
joeboch348 is offline  
post #7 of 8 (permalink) Old 06-15-2014, 07:09 PM Thread Starter
BenzWorld Member
 
Date registered: Jun 2010
Vehicle: '07 R320
Location: Virginia
Posts: 148
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
it has been a long time........I went out and looked at it.........could not see a big hose.........just the small one........you are talking about the tank or the PSP.......the clips come off by squeezing it by a pair of pliers. There is a notch....once you squeeze and clear that notch........it "pops out" of the notch. Then when you release it...........it becomes loose.

I believe the other hose may be the same.

Quote:
Originally Posted by joeboch348 View Post
Replacing my tank and o-ring tomorrow. How does the clip on the bigger hose come off?
Thanks
rajdude is offline  
post #8 of 8 (permalink) Old 06-15-2014, 07:12 PM Thread Starter
BenzWorld Member
 
Date registered: Jun 2010
Vehicle: '07 R320
Location: Virginia
Posts: 148
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
By the way,,,,,,,,,,,I should have reported back earlier.

I installed the new pump from ECS tuning myself....followed the service manual procedure for flushing out the bubbles..........in my case I could not see any....basically raise the front two wheels and turn steering wheel lock to lock while looking for bubbles............all without the engine running. I think you are supposed to do it 10 times or something like that.

It has been working fine ever since.
rajdude is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > Mercedes-Benz Vans/Trucks/SUV/Others > W251 R-Class

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 

Title goes here

close
video goes here
description goes here. Read Full Story
For the best viewing experience please update your browser to Google Chrome