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  #1  
Old 02-10-2003, 08:54 AM
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Join Date: Apr 2000
Location: Falls Church, VA
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Odd Engine Noise - 1995 C220

Our 1995 C220 has about 75K miles on it, and has always been reliable and trouble-free. It was a Starmark car when we got it in late 1999 with 39K and has always had maintenance by the book by good indies.

It has always had a noise that puzzled everyone and seems to be getting worse and more consistent with time.

I would describe it as a constant rattle from the front of the engine. Does not change with RPM and independent of engine or air temperature.

Yesterday I got out my most sophisticated diagnostic tool - a 3' length of heater hose - and listened around the front of the engine. The best fix I could get was the thermostat housing and the large horizontal metal tube leading to it that holds the various sensors. Removing the front snap-on cover changed the resonation of the noise.

It does not seem to be coming from the fan, water pump, valve train or crankcase. The thermostat and engine temperature appear to function normally - warms up and sits just above 80 degrees on the guage - and never any overheating problems.

Ideas welcome.
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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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  #2  
Old 02-10-2003, 09:04 AM
it leaks, its german
 
Join Date: Mar 2002
Location: raleigh nc
Posts: 1,111
take the belt off and see if the noise goes away, you might have a bad belt damper bushing.


Joe
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  #3  
Old 07-03-2003, 01:01 PM
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Join Date: Jun 2003
Location: The Netherlands
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Quote:
Originally posted by joe p
take the belt off and see if the noise goes away, you might have a bad belt damper bushing.


Joe

I see that this problem is posted a time ago, but I have the same problem, I own a c220D '96 and nobody can tell me were the noise is coming from. The noise isn't from the belt at the front of the engine. Can somebody tell me were the noise is coming from??

The car drives well and the engine temprature is good, normal oil-usage etc.

Is it the fuelpump?
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  #4  
Old 07-03-2003, 01:41 PM
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Join Date: Apr 2000
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My fault!

I should have posted this. It turned out to be bushing and shock absorber on the belt tensioner.
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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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