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m103 air pump disable?
the air pump on my m103 is extremely noisy and is making my near 200,000mi m103 sound like crap a friend of mine said he disabled his air pump (it wasnt a MB it was a Chevy truck from '88)..Is this wise/possible on an m103? I am just wondering..anyone ever do something like this?
thanks, kris
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#2
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You can easily do so by purchasing a shorter serpentine belt and installing it in such a way as to bypass the pulley for the pump. I did so on my M103 due to noisy clutch which made the car sound like a real beater. $400 for a new pump was not cost-effective for me, especially since I know the pump only runs for a few seconds after startup when the engine is cold. In my case, I removed the pump, but I'm not sure if I did that because I had to, or if I did it to save weight. In any event, I reinstall the pump once a year prior to getting inspected, then promptly remove it afterward. Make sure you cap the vacuum line(s) and the input to the exhaust. A plastic milk jug top screws right onto the rubber elbow, and I just wrap a plastic zip tie (cable tie) around it to make sure it doesn't warp from the exhaust heat and fall off. I haven't ever had a problem with this.
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08 W251 R350 97 W210 E320 91 W124 300E 86 W126 560SEL 85 W126 380SE Silver 85 W126 380SE Cranberry 79 W123 250 78 W123 280E 75 W114 280 |
#3
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I suppose it depends on the defect, but mine has been unplugged for years now, M103 engine. The clutch is electrically switched on and off. Follow the wire cable and unplug the connector. If that silences the pump, then you are fine. If still noisy, then either buy a re-built, find a way to repair your unit (there are posts on this), or take it out per prior post.
Steve |
#4
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there are no emissions testing in my state..
i was just consirned that removing it would harm the m103... ill try unplugging it.. thanks
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#5
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Air pump
The purpose of the air pump is to add more oxygen to the exhaust during cold enrichment to facilitate faster warmup of the catalyst thus the system goes into closed loop sooner. The air pump is also used by the computer to test the Oxygen sensor.
The most common failure is the double bearing in the pulley. Pulley kits are available on line #104 140 02 86 (they're not cheap) or take a chance with a used part. Mike |
#6
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if its making noise all the time, the clutch is probabaly toast and you'll want to go the route mentioned above in the 2nd post
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1980 500SE/AMG Euro 1981 500SEL Euro 1982 380SEL 1983 300TD 1983 500SEC/AMG Euro 1984 500SEC 1984 300TD Euro 1986 190E 2.3-16 1986 190E 2.3 1987 300D 1997 C36 AMG 2003 C320T 4matic past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350 |
#7
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Do a search on my name - I believe I posted the belt size, maybe even the brand and place of purchase.
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08 W251 R350 97 W210 E320 91 W124 300E 86 W126 560SEL 85 W126 380SE Silver 85 W126 380SE Cranberry 79 W123 250 78 W123 280E 75 W114 280 |
#8
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Check out the last post here: Smog pump removal and correct size belt installation on 1993 300E2.8.
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08 W251 R350 97 W210 E320 91 W124 300E 86 W126 560SEL 85 W126 380SE Silver 85 W126 380SE Cranberry 79 W123 250 78 W123 280E 75 W114 280 |
#9
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here are some videos i took of the car starting a few months ago...see if u can hear the same noise you guys did when u had trouble with your air pumps..
thanks http://s98.photobucket.com/albums/l250/MafiaNicky/?action=view¤t=m103noise3.flv now this noise may or maynot be present anymore im nor sure i kinda forgot about it at one point in the clip the engine is revved up ..when it comes back down to idle a second or so after that this rattling sound appears..what is it? is it that air pump? http://s98.photobucket.com/albums/l250/MafiaNicky/?action=view¤t=m103noise2.flv
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#10
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The a.i.r. pump seized on my 92 300TE and I replaced it with one from mbpumps.com - I had great service from them, ymmv. Thought about going the shorter belt route but decided not to mess with that.
Brian |
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