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Old 08-29-2007, 09:53 AM
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'86 420SEL: Klunk in Front Suspension

Hi, my 420 makes the occasional klunk in the right-front suspension. It usually happens when I am turning, as into a drive, and there is a change in elevation which flexes the suspension. It is one klunk, and it does not repeat, nor does it happen every time, and I haven't been able to reproduce it at will. I have good brake reaction arm joints (did it myself, about 5000 miles ago), and I cannot find any looseness in the ball joints by jacking up and prying on things. Shocks and tie rod ends seem tight. Car drives and tracks perfectly. I also can't find anything loose in the torsion bar or bushings. I thought you might have a similar experience and be able to offer advice.

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Old 08-29-2007, 09:54 AM
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Guide Rods - probability 88%
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Old 08-29-2007, 07:36 PM
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Overhaul time. Rent a spring compressor and have at it. Lots of threads on the subject, like mine for instance.

A list o'parts

W126 Front steering suspension rebuild list


Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL


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Old 08-29-2007, 08:11 PM
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On the guide rods, do the 4 mounting bushings as well. I've read where some people spent a lot of time pressing them out at home. I looked at mine on the first car I did, and decided to bring the entire asembly to the local auto machine shop. Twenty bucks later, all done, and I didn't even sweat. I'd suggest the same for you.
Thank You!
2001 E430 Sport, 204,000 miles
1997 C280 Sport, 144,000 miles
1991 300SL, 189,000 miles
1987 420SEL, 149,000 miles
1986 190e 2.3 16v, 151,000
1968 W30 442, 78,000 miles
1988 46' US1 Cougar, 3 supercharged 572's
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Old 09-01-2007, 09:02 AM
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my similar noise was upper control arms. The guide rod bushings only made noise when I went over bumps in the road.
95 E420 ( 76K) SOLD
85 380SE(125k)
95 SL500(72k)
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Old 09-01-2007, 09:44 AM
Join Date: Apr 2003
Location: NB Canada
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Originally Posted by Randy View Post
.... I have good brake reaction arm joints (did it myself, about 5000 miles ago),
What the heck are those?
1986 560SL
2002 Toyota Camry
1993 Lexus
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Old 09-01-2007, 11:12 AM
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Join Date: Dec 1999
Location: Utrecht, the Netherlands
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Collapsed engine mounts can also make a clunking sound while turning.


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