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#16
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also could try cleaning/wire brushing the bearing hubs where the rotors mount ~~~ dirt/rust underneath won't allow the rotor to sit flush and cause a vibration
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1989 300ce smoke silver / brazil, in a constant state of flux ~~~ |
#17
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It has also been done prior to mounting the new rotors.
__________________
1996 E320 since 1/16/08, 171K miles as of Feb 2011 --------------------------------------------------------- 1989 300CE - R.I.P. Dec 29 2007 Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE |
#18
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Thanks, I am going to give it a try.
__________________
1996 E320 since 1/16/08, 171K miles as of Feb 2011 --------------------------------------------------------- 1989 300CE - R.I.P. Dec 29 2007 Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE |
#19
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well, here's something...you mentioned that put new sway bar bushings in? Did you properly lubricate and pre-load these bushings? That could cause this...
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#20
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actually, the more I examine this thread, the more it seems that it's the sway bar bushings, as you been in there anyway...I'd look there first...I've seen this before in other German automobiles...these bushings are very tempermental to install....they do alot of work and don't like to be screwed with....if you do it incorrectly (the replacement) it will come back and raise some hell...if it were something like the brakes it would become more than apparent by now, same with wheel lugs and rim balancing and stuff like that there...no, this sounds like sway bar stuff to me...good luck
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#21
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I agree with above. Most of the components, wheel/tire, bearings, rotors are more inclined to have a lower frequency.
__________________
1981 300TD 2005 C55 2004 E500 1999 ML430 1992 400E 1998 C43 2001 SL500 1988 300SEL 1986 190E 16V 1991 190E 2.6 |
#22
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Quote:
Quote:
__________________
1996 E320 since 1/16/08, 171K miles as of Feb 2011 --------------------------------------------------------- 1989 300CE - R.I.P. Dec 29 2007 Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE |
#23
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Is it possible your work has caused a transmission fluid hose to come in contact with the chassis or the bar you just worked on?
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#24
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I don't think so but gonna have a look. Thanks!
__________________
1996 E320 since 1/16/08, 171K miles as of Feb 2011 --------------------------------------------------------- 1989 300CE - R.I.P. Dec 29 2007 Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE |
#25
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pre-loading
pre-loading is simply installing the part, you did OK with the soap initially, but that stuff dries out quickly, there is special stuff, but, anyway, preloading is installing the part while jacked up, of course, but not actually
torqing the fasteners to spec until after the car has been lowered off the jacks and all of the weight is on the suspension...that allows the bushings to seat in the proper fashion. If you lock the bushing/carriers into place without the proper stress you could experience what you mention. Your new bushings are fighting to situate themselves...Leads to premature wear as well.... |
#26
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Quote:
__________________
1996 E320 since 1/16/08, 171K miles as of Feb 2011 --------------------------------------------------------- 1989 300CE - R.I.P. Dec 29 2007 Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE |
#27
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yes....see? this is why everyone is not a mechanic, the important thing is, if you can conceptualize the issue the solution should appear shortly...good luck....
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#28
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pre-loading
Ask any decent Mercedes or any mechanic about pre-loading.....here's how I do it....I simply put the wheels back on and lower the car down onto a bunch of 4X4's while keeping some jack assistance..the lowering of the car onto its' haunches is sufficient..it allows everything to sit nice like. Then I go in and ratchet everything up...then you lift back up...remove the 4X4s or whatever, with the tires still on, lower the car via the jacks to the point where you can make sure the lugs are still tightened properly..if so (as it should be) drop the car and you should be good to go...there must enough room under there to do these things...are you sure your jacking the car up high enough?
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#29
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some good news; I thought I'd go with the easiest fix first. I checked my manual on the torque specifications and it says 80 ft.lb , meaning the wheels were a bit overtightened by 15 ft.lb. I bought a heavy torque wrench and retorqued them to specs. Voila, the vibration is gone!
It's surprising that just 15 ft pounds made a difference but it did. Thanks for all inputs, I keep them all in mind for future reference.
__________________
1996 E320 since 1/16/08, 171K miles as of Feb 2011 --------------------------------------------------------- 1989 300CE - R.I.P. Dec 29 2007 Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE |
#30
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Quote:
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__________________
1996 E320 since 1/16/08, 171K miles as of Feb 2011 --------------------------------------------------------- 1989 300CE - R.I.P. Dec 29 2007 Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE |
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