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#1
09-24-2010, 05:00 PM
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upper control arms 86 560SEL
Wow, just finished replacing right side upper control arm.. what PITA!! and it's supposed to be a super easy job...
had to drive the bolt that goes through the body in with my impact wrench. used a tall jack to lift up the sway bar so i could bet the ball joint off because the LCA/steering knuckle assembly wouldn't go low enough to come off all the way. now i'm looking at the left side and wondering if i can even do it? if the bolt is as hard to remove and replace on this side as it was on the right side i'll never get it done because there's no room to get my impact wrench in their with the engine stuff so close. the power steering hose and a/c hose are right there. any one have experience on a 560SEL?
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R Martin Dallas, TX (Addison) 86 560SEL, 128K 
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#2
09-24-2010, 06:14 PM
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Read these
How To: Upper Ball Joint Replacement, step by step with pictures. W123
http://www.peachparts.com/shopforum/showthread.php?p=2507705 w123 Upper Control Arm R&R- guide joint puller?? http://www.peachparts.com/shopforum/showthread.php?t=146580 Have a great day.
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ASE Master Mechanic https://whunter.carrd.co/ 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 2003 Volvo V70 https://www.boldegoist.com/
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#3
09-24-2010, 06:28 PM
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already read all that. thanks anyway. i have a 300SD so i know how much more room there is in the engine compartment.
but seriously, how in the world do you get any significant wrench on the upper control arm bolts on the left side of a 560SEL?
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R Martin Dallas, TX (Addison) 86 560SEL, 128K
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#4
09-24-2010, 07:05 PM
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I did the driver's side no problem. The only issue I had was getting the nut back on the bolt. Eventually I gave up on getting it just like factory and flipped it around so the nut was on the other side, not under the brake booster.
Its the other side that looks like a pain with what I think may require battery removal.
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1991 560 SEL / 185k miles 1992 750il / 17k miles - project car
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#5
09-24-2010, 07:20 PM
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no don't have to take the battery out. move the washer tank out of the way. then it's easy to get a box wrench on the nut. i used my impact wrench to back the bolt out and needed it to put the bolt back through. it would hardly go through the bushing sleeve.
what did you use to get the bolt out on the driver's side? i'm afraid if i need my impact wrench there is no room to get in there.
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R Martin Dallas, TX (Addison) 86 560SEL, 128K
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#6
09-24-2010, 07:21 PM
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Don't preload
One point I feel is important and correct me if I am wrong.
Assemble the front end parts and the parts such as the control arms and sway bars should be tightened after you lower the vehicle and it has weight on it. This way the rubber is not so "pre-loaded" so as to speak in these areas. Pls comment. God Bless John
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#7
09-24-2010, 07:27 PM
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yes, that's what i read on the CD. so i've just tightened everything but not to torgue specs yet.
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R Martin Dallas, TX (Addison) 86 560SEL, 128K
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#8
09-24-2010, 07:32 PM
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I really had no issue using a long length ratchet arm.
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1991 560 SEL / 185k miles 1992 750il / 17k miles - project car
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