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#1
02-15-2004, 11:55 PM
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DIY page, Introduction to Idler Arm Rebuild
What exactly is this thing and where is it? The idler arm is a fancy word for a bolt which ties the frame of the car to the steering rack. It makes sense, if the gearbox is supporting one side something has to support the other side, but what? An idler arm! What happens is when the rubber bushings get wear or aged they start making the car feel like a side to side swaying at slow speeds. This is caused by just that, the idler arm is allowing one wheel to move freely from side to side. You have to man-power the wheel quite a bit to see it move, but if and when it does move like that you know it is time to rebuild it. The test for this part would be to jack the front of the car off the ground and try to force the passenger side wheel to turn each way while watching the idler arm.
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Jeff M. Mercedes W123 DIY pages are now located here. 1983 / 1984 300D Sold 2000 CLK430 Cabriolet ~58k Sold 2005 Avalanche 4x4 ~66k Last edited by whunter; 08-25-2009 at 02:59 PM. 
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#2
03-15-2004, 12:01 AM
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Re: DIY page, Introduction to Idler Arm Rebuild
Hello BoostnBenz
This is a very nice idler arm DIY. EDIT: replaced bad link. http://boostnbenz.1baddsm.com/DIY/FrontSuspension/idlerarm/
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ Last edited by whunter; 08-25-2009 at 11:33 AM.
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#3
03-15-2004, 12:05 AM
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Thanks whunter.
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Jeff M. Mercedes W123 DIY pages are now located here. 1983 / 1984 300D Sold 2000 CLK430 Cabriolet ~58k Sold 2005 Avalanche 4x4 ~66k
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#4
03-15-2004, 12:20 AM
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Thanks for the DIY site!!!
How about a cruise control resolder DIY? Great work
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1979 300D 220 K miles 1995 C280 109 K miles 1992 Cadillac Eldorado Touring Coupe 57K miles SOLD ******************** 1979 240D 140Kmiles (bought for parents)  *SOLD.SAN FRANCISCO/(*San Diego) 1989 300SE 148 K miles *SOLD
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#5
03-15-2004, 12:26 AM
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Thanks.
My cruise control works just fine so nothing to fix but lietviai offered me to fix his if I ever feel so inclined to working on one.  I wouldn't count on anything very soon though.
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Jeff M. Mercedes W123 DIY pages are now located here. 1983 / 1984 300D Sold 2000 CLK430 Cabriolet ~58k Sold 2005 Avalanche 4x4 ~66k
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#6
07-17-2007, 04:58 PM
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Quote:
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83 SD 84 CD
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#8
11-02-2008, 05:56 AM
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#9
08-25-2009, 08:45 AM
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________________ punkinfair
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#10
04-15-2010, 03:40 PM
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Idler Arm
Boostnbenz, I may have to tackle the idler arm repair pretty soon. I read your write up. Thanks for that. Just have a couple of dumb questions. I assume you were working on it from under the car, right?
I've been hearing 'clicking" sounds whenever i turn left or right on the 84D (261k). Not sure whether to have my indy do it or me do it. I still have to get the part though. Is there a way to check if the culprit is in fact the idler arm? I know my tie rod ends are fine.
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the sooner you start... the sooner you'll get done  If it ain't broke, don't fix it.. Its always simpler to tell the truth...2007 Honda Accord EX 2007 Honda Accord SE V6 96 C220 97 Explorer - Found Another Home 2000 Honda Accord V6 - Found Another Home 85 300D - Found Another Home 84 300D - Found Another Home 80 300TD - Found Another Home Previous cars: 96 Caravan 87 Camry 84 Cressida 82 Vanagon 80 Fiesta 78 Nova Ford Cortina Opel Kadet 68 Kombi Contessa
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#11
04-16-2010, 12:33 AM
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Are there other issues that would start making the car feel like a side to side swaying at slow speeds?
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JWJ 1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG 1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG Biodiesel, Mobil Delvac 1, and Viton fuel lines!
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#12
04-16-2010, 12:48 AM
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On my sister's W201 I had to beat the bushings out of the holder....on my W124 they just fell out when I took the bolt out. The bolt on the W201 removed easily with a breaker bar. On the W124 it took the breaker bar + a 4 foot pipe.
 Almost broke my tools. The bolt/nut is larger on a W124....not sure on a W123/W126...I'm doing those in the coming months.
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-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#13
04-16-2010, 06:54 AM
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Quote:
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83 SD 84 CD
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#14
04-16-2010, 05:07 PM
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More data needed
Quote:
Do you feel it in your hands/feet or butt/back?
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#15
04-16-2010, 09:45 PM
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Quote:
In the back mostly.
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JWJ 1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG 1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG Biodiesel, Mobil Delvac 1, and Viton fuel lines!
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