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#1
01-08-2011, 08:12 PM
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W115 motor mount replacement & subframe removal w/pics
All i can say about this job is that i waited wayy to long to do it.
It feels like a different car, no more vibrating, loud resonating sounds through-out the cabin... so smooth at idle you almost wouldn't know it running.. Someone before me had tried to replace the motor mounts and stripped out 2 of the 6mm mounting bolts that hold the mounts to the subframe. Well in the W115 300D there was not anywhere near enough remove to remove the stripped bolts with the subframe still in place, so i had to drop the subframe. To remove the stripped allen bolts i took a 12mm 12 point socket and hammered it over the head of the bolt, worked great. Its was actually a fairly simple jobs, just lots of things had to be done before you were ready to drop the subframe. it also required at least 2 people. here are some pics. I used 2 floor jacks to lower the subframe, bottle jack to support the motor, and jack stand to support the front part of the subframe since the subframe would always want to fall forward.           
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1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg 
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#2
01-08-2011, 09:15 PM
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Did you only replace the motor mounts with subframe out? Excuse me ignorance, but does the w115 have subframe bushings like the 108's or 111's?
Best Regards, David
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_____________________________________________ 2000 Honda Accord V6 137k miles 1972 300SEL 4.5 98k miles _____________________________________________
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#3
01-08-2011, 09:21 PM
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Yeah at this time i only did the motor mounts. I replaced the subframe mounts last year, so there was no need to replace them again...
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1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg
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#5
01-08-2011, 10:06 PM
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yeah i inspected my tranny mount and its shot, im gonna order one ASAP.
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1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg
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#6
01-09-2011, 07:49 AM
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Doesn't look like a fun job. But, one that should have been much easier. Sometimes PO's just get me...
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79 MB 280 SEL Euro 133k 77 MB 450SL 154k 05 Mustang GT Vert (3) 104k 12 TSX Wagon Tech (66k) (192k) 06 Subaru Outback base (135k) 164k 16 Acura MDX (109k) 111k 18 Silverado 2500 LTZ Midnight (212) 56k 97 Ford Ranger 163k 11 RAV4 154k 01 Escape 173k 04 Honda Pilot 292k 1967 Mustang (Resto Project) 1968 Mustang (Parts Bin) 00 Ford Ranger 124k
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#7
01-09-2011, 08:54 PM
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When I did mine the bolts were not stripped, so it was not a challenging job like yours. I am impressed!
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Your TACH may have a loose connection...I was wondering why your mechanic would be dead one minute then flopping around the next... PanzerSD i am inspired. i will replace my windsheild... with an intercooler. swedishK
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#8
01-10-2011, 12:24 AM
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You wanna come help me? I need to do the motor mounts and sub-frame bushings on my 71 220D. Great looking car BTW!
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#9
01-10-2011, 12:26 AM
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It looks even better in person!!! Really nice.
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#10
01-10-2011, 12:41 AM
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Quote:
Great before and after. I Got a New Toy - W115 1976 300D
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1985 500SL Euro w/ AMG bits 130k  1984 300SD Turbodiesel 192k  1980 240D Stick China 188k  2001 CLK55 AMG 101k  2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!! 
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#11
01-10-2011, 05:47 PM
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Colorado, this is actually and fairly simple job, I didn't run into the first problem, or hang up, if you have an extra hand you shouldn't have any trouble.
Thanks for posting that link Tyler, I should prolly add this to my original thread.....
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1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg
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#12
01-21-2011, 08:04 PM
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Looks great. I'm getting mine done by a mechanic, any idea what a job like this should cost?
I'm in southern California with a 1976 300D w115 body style I would love to do it myself, just not skilled enough
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#13
01-21-2011, 10:06 PM
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Nice work 79Mercy. I should look into my 115 too. Hopefully its still in good shape..
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'76 300D '82 230CE '84 300DT '91 300D 2.5 '86 300D 5 speed '86 250D 5 speed '90 300E 24v '88 560SEC 300TE euro 5 speed 91 350SD http://i75.photobucket.com/albums/i3...d6605222-1.jpg
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#14
01-22-2011, 06:49 PM
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ohbella, if your bolts are not stripped out the job should be about a 2-3 hour job on a W115. Its a little more tough than doing motor mounts on a W123 from my experience. So i assume the mechanic might charge you about $350.
euroamg, I hope your bolts are not stripped like mine.
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1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg
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#15
01-22-2011, 09:18 PM
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Quote:
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