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Old 09-02-2010, 07:45 PM
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Join Date: Aug 2007
Location: Vallejo,CA
Posts: 194
possible front bearing gone bad

i have been posting alot latley just trying to sort out all the problems with the 1995 300d i just purchased.
there is some loud humming noise comming from the front once you get pased 30mph. when you turn while driving the noise goes away and returns when the wheels are straight again.
how hard is it to diy a front bearing, i could only find write ups on the rear bearing which seemed to be a real pain. just in case youre wandering why i type in all lower case, my keyboard had locked up

1987 300D
2005 E320 CDI
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Old 09-02-2010, 08:23 PM
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Join Date: May 2004
Location: Natchez MS and Dallas TX
Posts: 355
I did my 300sd last year. No harder than on an american car. No special tools required. Not sure if exactly same as yours.
85 300 SD ~ 115K
82 500 SEC Euro ??K
78 450SL 164K
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Old 09-02-2010, 10:15 PM
lutzTD's Avatar
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Join Date: Oct 2006
Location: Lutz, Florida (N of Tampa)
Posts: 2,458
look in the DIY section. MB specs the nut tightness with an end play measurement rather than the old tighten it and loose it half turn

1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)
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Old 09-02-2010, 10:35 PM
Diesel911's Avatar
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Join Date: Sep 2007
Location: Long Beach,CA
Posts: 34,958
Originally Posted by lutzTD View Post
look in the DIY section. MB specs the nut tightness with an end play measurement rather than the old tighten it and loose it half turn
And, checking that end play with a Dial Indicator.
84 300D, 82 Volvo 244Gl Diesel
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Old 09-03-2010, 06:07 AM
t walgamuth's Avatar
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 36,293
They get loose with wear and need tightened around 100K. You might get by with packing and tightening them. If after you clean it well it feels nice and smooth you can reuse it.

[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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