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#1
03-10-2009, 10:48 PM
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This noise is bad news, I know, but how bad?
So, I thought it was something in my trunk. A distinct "THUNK" everytime I hit a pothole (which in Michigan is approximately every 8 seconds). I cleared the trunk, and it's not something loose in the trunk.
It's something on/in/near the rear driver side wheel.  NOOOOOOOOOooooooooooo!I don't know what to look for, and I trust the dealer like I trust Bernard Madoff. Please advise what this noise could be--I'm thinking that I should not drive Lola until I get this resolved. There is a faint wobble now in the steering whenever I hit the potholes (unless my imagination has made me paranoid--a possibility I cannot rule out).  The noise sounds like the underside of the car was hit by a blunt object--and I'm certain I feel the wheel wobble a bit.
__________________
84 300D anthracite grey, tan interior "Lola"  Diesel smells like farvegnugen!
Last edited by niki716; 03-10-2009 at 10:50 PM. Reason: spelling nazi 
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#2
03-10-2009, 10:51 PM
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Perhaps a blown shock, damaged spring, or damaged trailing arm (if in the rear)?
Or maybe a bearing is damaged. Or on the way simpler side of things....might just be a damaged tire. Could have snapped a belt or cable inside your tire. I'd have them checked out. W123's have really rugged suspension.....if you hit a pothole the tire/wheel take most of the force.
__________________
-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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#3
03-11-2009, 12:26 AM
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Also sway bar links make scary noises, at least when turning, when they are broken.
I bet this isnt going to be that expensive of an issue, especially if not tied to some major event (running into/over a curb etc.). Try to find an independent mechanic you can trust, and then get a second opinion from another.
__________________
------------------------------- '85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit) '82 300D, 'Tex', 228k body / 170k engine ... summer car '83 300TD Cali Wagon 210k, wife's car
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#4
03-11-2009, 12:28 AM
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My money is on a dead sway bar link.
__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine
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#6
03-11-2009, 11:01 PM
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It's not the exhaust
that's the only thing I'd recognize. the sway bar link and trailing arms are new to me. I know (kinda) what the shocks and springs are supposed to look like. thanks, I'd crawl under with a flashlite and do some left/right front/back comparisons.
My big concern was is the wheel gonna fall off? Sounds like no.  right? 
__________________
84 300D anthracite grey, tan interior "Lola" Diesel smells like farvegnugen!
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#7
03-11-2009, 11:08 PM
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a sagging exhaust will be easy to rule out... and as for your wheel falling off, probably not happening soon, is it localized? to one side?
probably sounds a heck of alot better than a diesel engine running with no oil  Ive heard that before, sitting in the driver seat, made me cry
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#8
03-12-2009, 12:25 AM
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It could be trailing arm bushings, especially if you feel a "shift" in the steering. I noticed a sideways shift when taking curves such as a freeway interchange ramp. It's not easy to determine the condition of the bushings until you drop them. To do so, an MB spring compressor is needed. But regarding this possibility the first question is, are you noticing any unusual rear tire wear?
__________________
Sam 84 300SD 350K+ miles ( Blue Belle )
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#9
03-12-2009, 01:10 AM
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I would also check the sway links. They are white plastic on each side right by the wheel.
I highly doubt there's any risk of the wheel falling off. W123's have a very rugged suspension....
__________________
-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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#10
03-12-2009, 03:50 AM
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Quote:
__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine
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#11
03-12-2009, 05:16 AM
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Quote:
__________________
H.D.B. OBK #45 ----------------------- '75 W115 240D, wife's dd, 197K ........'75 W115 300D, my dd, 245K .. .. ..........'82 W126 300SD, the 'someday' project
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#12
05-19-2009, 03:17 AM
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one more for sway bar link
easy fix
__________________
George Vincent: 1984 300D - 255,000 miles - NEW! Wilbur: 1991 GMC Sonoma 2WD 2.5L 5-speed 250,000 km (top secret project) Pancho: 1992 Mitsubishi Pajero SWB RHD 2.5L intercooled turbodiesel - 215,000 km
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#13
05-19-2009, 08:07 AM
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No doubt, sway bar link. Sounds like a midget banging on the sheet metal.
__________________
CC: NSA All things are burning, know this and be released. 82 Benz 240 D, Kuan Yin 12 Ford Escape 4wd You're four times It's hard to more likely to concentrate on have an accident two things when you're on at the same time. a cell phone. www.kiva.org It's not like there's anything wrong with feeling good, is there?
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#14
05-19-2009, 11:37 AM
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Quote:
I vote for blown shock. I just had that happen last month. Both rear shocks went and every time I drove over a pothole the car would make a really nasty THUNK! noise. I would also get a wobble in the steering whenever it happened. Easy way to test it, go to the back of your car and quickly push down and release above each wheel well. If the car bounces more than one or twice ... shocks are gone. (the steering wobble is because the rear-end no longer bieng held by the shocks ... so its really bouncy. So essentially the rear end of your car lifts off the road when you bounce back from the pot hole, which results in a loss of traction .. and thus a wobble ... scary feeling btw) So if it is the shocks, how bad is it? you can drive it like that. I wouldent recommend driving at high speed, and I'd get the shocks replaced as soon as possible. Will be expensive though because its highly recommended that you should do both the left and right rear shocks at the same time. Even if one side is good. Get HD shocks too btw.
__________________
Name: Daisy, or Bertha ... depends on the day. Details: US 1985 W123 Mercedes 300D Turbo. 227,000 Miles, and still strong. Runs on Diesel in the winter, and B20 in the summer. History: She was run on French Fry Oil by a previous owner, which really borked the fuel system. Now fixed. Previous owner held the car together with Duct tape, spit and whatever he could find at the local pepboys for under $5. I am now paying for his lack of caring for the car.  Ottawa Ontario Canada
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