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  #1  
Old 05-09-2009, 10:00 AM
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Join Date: Feb 2001
Location: Saint Marys Ga
Posts: 103
4.5 air suspension compressor

I have a rattle coming from my air sus. compressor.It does not increase with engine speed.I can only compare it to the sound of an a/c compressor that has started siezing(sp)It is not external as I have checked all bolts ,nuts and lines.I replaced the belt about 2 weeks ago.just in case does anyone know if rebuild kits are available?thanks

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  #2  
Old 05-11-2009, 10:30 PM
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Join Date: May 2006
Location: Boston
Posts: 1,410
Can be the ball bearing? My compressor also does some suspicious noise but I have never opened it. I heard that the ball bearing can go bad. At least this is what I think causes the noise in my compressor.
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  #3  
Old 05-12-2009, 06:10 AM
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Location: Long Island, NY
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It's rebuildable. There are a couple of good threads on the rebuild process over at the www.m-100.cc site.

I'd recommend finding a used compressor and swapping this one out. If the used one is better, then you have plenty of time to do a rebuild.

It's basically a one cylinder engine w/o the overhead and troubles caused by fuel.

-CTH
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Old 05-12-2009, 10:11 AM
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Location: Northern Va.
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Is there any oil in it?
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Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

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  #5  
Old 05-12-2009, 12:31 PM
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Join Date: Feb 2001
Location: Saint Marys Ga
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4.5 compressor

I am assuming it has oil in it,as it is fed from the engine.mercedes classic center only offers gasket and o ring set.$130! I should look into a spare,but I would like to diagnose this one. ball bearing sounds like a good idea.the noise sounds more like a squeaking pully(hence the ball bearing near the front of the pulley .It is very hard to tell with the engine running.does anyone know if the 5 pully setup on the crank is one piece? I am trying to avoid removing the belts as I just replaced 3.thanks

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