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Vibration Sensation Agitation
85 300D turbo. I am starting to notice vibration whenever I am on the gas pedal: accelerating, cruising, decelerating. Does not seem to change with speed, is not there at idle, is almost always there when my foot is on the gas pedal.
What's the likely cause? My diagnostic and repair skills are (ahem) limited. Thanks. |
#2
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You say the vibration is not noticable at idle. Is that with the tranny in Park or in gear.
I would first have the engine mounts, engine shocks, and tranny mount inspected. You can also move the linkage by hand while the engine is running and in park. You may also have a bit of fuel starvation. How are the filters? Air filter can be dirty also. Do you notice any smoke when the vibration occurs?
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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 |
#3
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
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Thanks for the suggestions. I have not noticed the vibration when in Park. Let's say I am driving down the street at a constant speed, vibration is there. When I take my foot off the gas and coast to a stop at a light, the vibration is gone from the time I take my foot off the gas until I give it gas to start off again. I have not noticed smoke. Since the vibration is there so much of the time, if vibration=smoke then it would be smoking almost all the time. So, I suspect no smoke.
If there was fuel starvation happening, would there be a noticeable loss of power (I have not noticed that)? Can you explain what you mean about shaking the linkage (keeping in mind that I am not much of a mechanic, and this is my first MB). I want to exhaust my limited DIY diagnostic abilities before taking the car in to the shop. Thanks again. |
#5
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Slip it iunto neutrak when it's doing it to narrow it down a little. If it disappears in nuetral (while moving under the same circumstances as when it's happening), it could be driveline related. If it still exists under those conditions, I would check the motor mounts, tranny mounts, and all that usual stuff.
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1989 300E 144K |
#6
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Solved
FYI, turns out that two of the three bolts on the driveshaft flange had sheared off. I found out the hard way today, when the third bolt went.
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#7
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!! Did it do much damage? There's a link on Dieselgiant's page that shows some damage from that occurring on a W126 I believe. Any pics?
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Seth 1984 300D 225K 1985 300D Donor body 1985 300D Turbo 165K. Totaled. Donor Engine. It runs!!! 1980 300SD 311K My New Baby. 1979 BMW 633csi 62K+++? Dead odo |
#8
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I had it done at the shop, so I have no pics. He said the hole on the last bolt to go had deformed some, but thought it would be fine. Just labor plus new bolts. The only damage was $216 to my credit card!
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#9
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Oh ah yes those pesky flex disks!
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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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