Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-02-2010, 10:46 PM
Registered User
 
Join Date: Nov 2008
Location: Goodyear, Arizona
Posts: 168
Unhappy Horrible noise

Coming from the front of the engine compartment in my E320 Station Wagon.

Tried to stethescope it but I can't tell.

It sounds really loud when the engine is being shut off and at times when accelerated.

Sound like a bucket of bolts is loose inside a rotating drum.

Otherwise car runs good, a/c works and power steering is ok.

Any thoughts?

thanks.

Reply With Quote
  #2  
Old 09-02-2010, 10:57 PM
Rahulio1989300E's Avatar
V10s & V8s FTW!
 
Join Date: Jan 2005
Posts: 1,147
Any fluids leaking?
__________________
2006 BMW M5 "Heidi" @ 109,000 miles
2005 MBZ C55 AMG "Lorelai" @ 165,000 miles
1991 MBZ 300E "Benzachino II" @ 165,000 miles
1990 MBZ 500SL "Shoshanna" @ 118,000 miles

(On the hunt for a good used M103 engine as of 6/10/23, PM me if you have one to sell!)
Reply With Quote
  #3  
Old 09-02-2010, 11:05 PM
RobertFini's Avatar
Registered User
 
Join Date: Oct 2002
Location: Port Elizabeth, NJ
Posts: 275
Fan hitting the shroud, maybe?
__________________
Robert Fini

'12 ML350 BlueTec, 87k
'06 E320CDI, 270k
'05 T1N Sprinter 2500/Pleasure-Way Plateau TS, 69k
'97 C36AMG, 313k (son's)
'94 E320T, 249k
'93 190E Sportline LE, 168k (daughter's)
'84 190E-2.3/5spd (Stage Rally Racer)
'66 230 W110 Sedan (Barn Find, Vintage Racer build in progress)
Reply With Quote
  #4  
Old 09-03-2010, 03:54 PM
Registered User
 
Join Date: May 2009
Posts: 398
Smog pump ate itself? Idler pulley bearing? Power steering pump? Valves due to oil tubes cracked and not getting valves enough oil?
Reply With Quote
  #5  
Old 09-03-2010, 06:14 PM
RobertFini's Avatar
Registered User
 
Join Date: Oct 2002
Location: Port Elizabeth, NJ
Posts: 275
The reason I'm asking about fan hitting shroud is that the noise only happens on engine shut-down and occasionally on acceleration, which could mean it's a bad motor mount that's allowing the engine to move beyond it's allowable limits and thereby causing the engine-driven fan to impact the shroud.

The other proposed causes (smog pump, pulley bearings, etc.) would cause a constant noise, not just on shut-down and acceleration.

Just a theory.

Best Regards,
Rob
__________________
Robert Fini

'12 ML350 BlueTec, 87k
'06 E320CDI, 270k
'05 T1N Sprinter 2500/Pleasure-Way Plateau TS, 69k
'97 C36AMG, 313k (son's)
'94 E320T, 249k
'93 190E Sportline LE, 168k (daughter's)
'84 190E-2.3/5spd (Stage Rally Racer)
'66 230 W110 Sedan (Barn Find, Vintage Racer build in progress)
Reply With Quote
  #6  
Old 09-04-2010, 05:08 AM
Registered User
 
Join Date: Aug 2002
Location: Southeastern PA
Posts: 3,077
nestorb98, if the fan is hitting the shroud you will see rub marks on both the fan blade tips and the shroud. If that's the case realign the shroud slightly to eliminate the rubbing until you replace the engine mounts, or if it's not possible to adjust the shroud position simply remove it temporarily.
__________________
Fred Hoelzle
Reply With Quote
  #7  
Old 09-04-2010, 11:31 PM
Can't Know's Avatar
Registered Slacker
 
Join Date: Sep 2010
Location: Sunny CA
Posts: 733
What year? I'd take the belt off it and do a start, rev, shut down. If the noise is gone you know it's one of the belt-driven things. If it's still there it might be the tensioner or chain or slides depending on engine. Check the HB too, in the 210 cars there was a recall for them, probably not it but can't hurt to check.
Reply With Quote
  #8  
Old 09-05-2010, 02:13 PM
Registered User
 
Join Date: May 2009
Posts: 398
Could be a cat gone bad also, the 96 and up cats have that darn brick that rusts and breaks loose and sounds like rocks in a can. My wife ML one side went then the other. Gotta pull a bunch of stuff off to get the exhaust out and replace as the entire piece is cheaper than installing 1 cat.
Reply With Quote
  #9  
Old 09-05-2010, 02:24 PM
david s poole
 
Join Date: Mar 2005
Location: dallas
Posts: 1,822
i'll vote for the engine fan hitting the shroud caused by broken motor mount or loose shroud.
__________________
David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
http://www.w108.org/gallery/albums/A...1159.thumb.jpg
Reply With Quote
  #10  
Old 09-05-2010, 05:42 PM
Can't Know's Avatar
Registered Slacker
 
Join Date: Sep 2010
Location: Sunny CA
Posts: 733
Quote:
Originally Posted by david s poole View Post
i'll vote for the engine fan hitting the shroud caused by broken motor mount or loose shroud.
Depending on the year it may not even have a mechanical fan. We're all just kind of guessing, which isn't much help to the OP, but then we didn't get much to start with.
Reply With Quote
  #11  
Old 09-05-2010, 06:29 PM
Registered User
 
Join Date: Nov 2008
Location: Goodyear, Arizona
Posts: 168
Well guys...thanks for your inputs!

I took off the fan shroud and noise was still there.

Very loud and right by the A/C compressor...cycled the A/C and noise became louder when A/C went off.

Removed #7 fuse and noticed a change in the noise, so I think the compressor is kaput!

Car runs great so its me or an indy to the rescue...dealership is out of the question.

I have never done an A/C replacement on anything before...could this be done at home?

any thoughts?

thanks again
Reply With Quote
  #12  
Old 09-05-2010, 07:29 PM
david s poole
 
Join Date: Mar 2005
Location: dallas
Posts: 1,822
so the bearing in the front idler pulley of the compressor took a dive.only seen that once before.
__________________
David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
http://www.w108.org/gallery/albums/A...1159.thumb.jpg
Reply With Quote
  #13  
Old 09-06-2010, 10:12 PM
Registered User
 
Join Date: Nov 2008
Location: Goodyear, Arizona
Posts: 168
How dificult is it for a do it yourselfer to repair this?
Reply With Quote
  #14  
Old 09-07-2010, 12:08 PM
david s poole
 
Join Date: Mar 2005
Location: dallas
Posts: 1,822
you need to remove the compressor and then have the right puller to get it off.the cost of new or rebuilt clutch assembly is not much less than a rebuilt compressor.
__________________
David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
http://www.w108.org/gallery/albums/A...1159.thumb.jpg
Reply With Quote
  #15  
Old 09-07-2010, 03:41 PM
Registered User
 
Join Date: Apr 2007
Location: By the City by the Bay
Posts: 56
Actually, on some models you can unbolt the compressor and jockey it around in the engine bay and use the puller in place.

So, how about telling us WHICH model and engine of E320 you are working on?

If you do have to remove the compressor, that means you have to recover the refrigerant (PLEASE don't just vent it to the atmosphere), evacuate the system and then recharge it with the correct amount of oil and refrigant. If you use an indie shop to recover the refrigerant, they may give you a discount on the evacuation and recharging steps, which they'll have to do in any event. Since they get to resell/reuse your recovered refrigerant and know you'll come back for the rest, hence some give you a discount (I've known some that did it for free, which is nice).

And if you have to remove the compressor, then I'm with David: just buy a rebuilt compressor with the new clutch and bearing assembly already in place. The added cost of the recovery, evacuation and recharge makes the cost difference in parts less important.

Good luck.

Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 04:45 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page