E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

air pump

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Old Jun 9, 2006 | 03:24 PM
  #1  
frankjones's Avatar
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air pump

"93 300e 2.8. loud roar/whine for about 15 seconds after start-up. think it's the air pump. anything serious? 150K miles. thanks
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Old Jun 10, 2006 | 12:23 PM
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Barrington1's Avatar
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Have it checked out immediatley. I am at 160k Miles, I just recently had to have my air pump replaced, it was rather expensive. The problem is if you do you not replace it right away there if a possibility if it blows it can cause your belts to break and to fall on your tranny and you'll have to get your car towed. Have it checked out right away man.
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Old Jun 10, 2006 | 03:09 PM
  #3  
Makahveli's Avatar
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From: Denver,CO USA
"88 300CE- First Year Production
air pump? what is this for?
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Old Jun 10, 2006 | 04:09 PM
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From: Anaheim
MB 300E | BMW M Coupe
Originally Posted by Makahveli
air pump? what is this for?
yeah....my car makes the exact sound and has been for 5-6 months now and the car still runs fine....I know I should have it replaced but the replacement indeed is rather expensive and I only have a part time job. I also spend carelessly so it is hard to save up...hehehe
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Old Jun 10, 2006 | 04:14 PM
  #5  
ashman's Avatar
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From: Sherman Oaks
2004 C240, 2015 GL350 Bluetec
there is aguy I know selling them rebuilt for like $180.00 plus shipping and you need to send in your core...

I am planning on this soon. and he guarantees them for I believe a year.

Alon
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Old Jun 13, 2006 | 08:44 AM
  #6  
GORBETTTEAM's Avatar
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From: Lockport, IL
'95 3.2 M104
ash...
$180.00 ain't that bad....let me know the address and that guy infos. thanks.
- gorb -
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Old Jun 25, 2006 | 12:01 PM
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Fan bracket

That is what i thought at first. At close inspection I found it was fan bracket and not pump. Take a closer look.
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Old Jun 26, 2006 | 09:01 AM
  #8  
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From: Hedgesville, WV
1990 300E 2.6
If the pump has not yet "self-destructed", you can pull it and replace the bearing. This is what usually goes on the pump and is relatively inexpensive. Have not yet done it myself but there are threads around on some of the boards.
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Old Jun 27, 2006 | 11:47 AM
  #9  
mhorn's Avatar
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From: Richmond, Va.
1991 300E
there's a thread on this board about what size belt you would need if you take the pump out totally. I don't know if you will pass emmissions though.
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Old Jun 27, 2006 | 05:07 PM
  #10  
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From: Hedgesville, WV
1990 300E 2.6
There is really no need to take the pump out of the system. Besides, it is probably illegal and will result in more air pollution. The pump injects air into the exhaust system to aid in reduction of pollutants. Caught in time and the bearing replaced will solve the problem of self-destruction of the air pump.
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Old Aug 10, 2007 | 03:53 PM
  #11  
BOBS300CE's Avatar
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From: Ashland, OR
90 300CE w/ Lorinser mods, 87 Toyota 4Runner
I just bought a rebuilt air pump for my 1990 300CE and I am getting ready to swap out my old loud whinning air pump this weekend. Does anyone have a write up of how to do this? I'd assume it is as easy as loosening the belt tensioner, removing a couple of bolts to remove the old air pump, and then bolting in the new one. Any recommendations?
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