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#1
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Funny "boing" sound
It started yesterday. Sometimes when I turn or go over a speed bump, I hear a distinctive "spring" or gong type sound coming from (i think) the rear section of the car.
I looked underneath and saw nothing. I will try this weekend to raise each wheel, spin it by hand and see if i can replicate the sound. Anyone here have any ideas what it could be? It 'feels' like a spring being released from tension. Vague description I know.
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Jennifer 90 350sdl |
#2
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By the way, if you like Starbucks coffee, they are giving it away over at the Open Forum of Mercedesshop. Seriously. Check it out, it is good till the end of the month.
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Jennifer 90 350sdl |
#3
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The sound you are describing does not sound wheel related. Other than caused by the wheel going up and down. Before jacking the car up bounce test each rear corner of the car. Same if you were checking for bad shocks. This may enable you to locate the exact area the noise is coming from if you can reproduce it.
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#4
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Maybe something simple like an exhaust hanger?
Sixto 87 300D |
#5
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I'm not very familiar w/ the chasis. Do you have independent susp?
I personally would check the upper and lower spring perches, torsion bars, and shock mounting bolts. then start with inspection of the joints. if it is in the front, then there is an excellent chance it is the upper strut mounts / bearings. Another commonly overlooked item is shock fatigue; if you think there might be too much bounce in the rear, it could be related (ie.. overworked springs wearing out their cushions) |
#6
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I've experienced a similar thing in my 82 wagon. It usually happens when I am turning hard one way or the other, and I go into a parking lot with a steep entrance. Its a deep sound from the rear. I only hear it in those situations, which isn't very often. The only things I can thing of that would make a sound like that would be the rear springs or the sway bar.
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Andrew '04 Jetta TDI Wagon '82 300TD ~ Winnie ~ Sold '77 300D ~ Sold
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#7
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I have this same sound, its the sway bar rubber. Take some grease or oil and shoot it in the bushing and it will stop the noise for awhile. (you can also use graphite if you want the bushings to last longer)
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Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? As long as they would add one additional commandment for you to keep thy religion to thyself. George Carlin (Wonder where he is now..) 1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won. pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt. |
#8
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Agree that it probably the rear sway bar ends ( I assume you car has them too). They are just little extenders that connect the rear sway bar to the wheel at the top. They are cheap and easy to fix.
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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??) |
#9
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Check the exhaust hangers and all the other stuff mentioned. Also look for a broken shock hitting the spring.
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K |
#10
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And check your ball joints. Mine are going bad on the SD and it makes a similar noise.
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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 |
#11
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Your sway bar linkage could have popped under pressure.
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http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42 |
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