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  #1  
Old 04-03-2006, 05:15 PM
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Strange Power Steering Noise on a W140

1992 W140 300SD (350SD).

WHen I steering at low speed in the morning, it screeches. When hot, it seems to go away. Please help. Thanks. Also, I need a motor mount, because it seems the oil leaks from it, where can I get it for cheap. Thanks.

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1992 300SD, 290K miles.
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  #2  
Old 04-03-2006, 06:46 PM
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Join Date: Oct 2004
Location: Grand Rapids, MI
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Sounds like a loose belt....though that car has serpentine.....hmm.

Belt tensioner? Usually a screech is the belt and not the pump, could be the pump though.

Suspects:

-Belt
-Belt tensioner
-Pump Itself

The mounts engine mounts themselves are fluid filled, is that what you mean for the oil leaking from it? Its a common failure, simply buy a new mount. Click "buy parts" at the top of this page and select your model, or you can call phil with the phone number on that page. Putting it in is probably not a pleasant experience though....
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  #3  
Old 04-11-2006, 05:28 PM
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Quote:
Originally Posted by pawoSD
Sounds like a loose belt....though that car has serpentine.....hmm.

Belt tensioner? Usually a screech is the belt and not the pump, could be the pump though.

Suspects:

-Belt
-Belt tensioner
-Pump Itself

The mounts engine mounts themselves are fluid filled, is that what you mean for the oil leaking from it? Its a common failure, simply buy a new mount. Click "buy parts" at the top of this page and select your model, or you can call phil with the phone number on that page. Putting it in is probably not a pleasant experience though....

If the noise only occur when steering, how could a belt be a possibilty ? Thanks.
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  #4  
Old 04-11-2006, 05:43 PM
Craig
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Quote:
Originally Posted by Californian
If the noise only occur when steering, how could a belt be a possibilty ? Thanks.
That's typical for a loose power steering pump belt. The pump only has a load when turning, causing a (somewhat) loose belt to slip.
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  #5  
Old 04-11-2006, 06:40 PM
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Location: Milford, CT
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Since that is a serp belt you do not want it to break! When they do they usually take a few hundred bucks worth of other parts with them.

The serp belt failed on my friends 735IL back in highschool. Ripped the radiator hoses right off the radiator! $30 belt+$700 radiator and it was good as new!

Sounds like the tensioner is not doing its job. Inspect it and see whats the matter.
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  #6  
Old 04-11-2006, 07:33 PM
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Quote:
Originally Posted by Hatterasguy
Since that is a serp belt you do not want it to break! When they do they usually take a few hundred bucks worth of other parts with them.

The serp belt failed on my friends 735IL back in highschool. Ripped the radiator hoses right off the radiator! $30 belt+$700 radiator and it was good as new!

Sounds like the tensioner is not doing its job. Inspect it and see whats the matter.
Thanks guy. My bro in law worked on changing the Alternator. I think he screwed up. Every time this guy touched my cars, tons other things followed. I hates him and he hates me too.
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  #7  
Old 04-11-2006, 07:36 PM
Craig
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Quote:
Originally Posted by Californian
Thanks guy. My bro in law worked on changing the Alternator. I think he screwed up. Every time this guy touched my cars, tons other things followed. I hates him and he hates me too.
Are you sure you want him working on your car, better check your brake lines.
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  #8  
Old 04-11-2006, 08:05 PM
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Quote:
Originally Posted by Craig
Are you sure you want him working on your car, better check your brake lines.

Probably not anymore. :-)

Any folks, could you check on what this part is ? It looks like a shock on the engine. Would it be the culprit from which the oil came out ?
Here is the part number:
604 200 02 14

http://72.14.203.104/search?q=cache:SijNtXixeSAJ:www.speed-autoteile.com/MB.EXP.03-2005.xls+604+200+02+14+mercedes&hl=en&gl=us&ct=clnk&cd=1

Says here that it is a tightener.

I check and az autohauz and the picture of the motor mount is nothing similar to what I see.
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  #9  
Old 04-11-2006, 08:20 PM
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Join Date: Nov 2002
Location: Milford, CT
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Their is the engine mount, replace in pairs:
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1MB12FET61RZ15E04I&year=1992&make=MB&model=300-SD-003&category=All&part=Engine+Mount

You need to inspect the belt tensioner to see what is wrong. Maybe bring it to a good shop.

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