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#1
10-27-2011, 11:53 AM
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Motor Mount Replacement
OK sports fans . . . I have done very little under the hood of my '83 300D and find myself having to replace the drivers' side motor mount. Exactly what tools (size) will be needed for the job, and can someone give me complete directions to do in my driveway?
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1983 300D, the "Avocado" 1976 240D, 4-spd the "Pumpkin", SOLD to Pierre 1984 190D, 2.2L, 5-spd, my intro to MBZ diesels, crashed into in 2002 
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#2
10-27-2011, 12:55 PM
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I am pretty sure there are really good threads in the archives with all that information ..
AND I would suggest really thinking about not just replacing ONE...
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html
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#3
10-27-2011, 02:32 PM
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Motor Mounts
Quote:
I did see where one poster gave step-by-step instructions, but I haven't found the thread on the DIY stuff, yet. Lots about the suspension, but nothing specifically covering the motor mounts. I have to dig up my tools, and it would be nice to know what size mm socket or wrench I'll need to use before I even jack it up. That's all.
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1983 300D, the "Avocado" 1976 240D, 4-spd the "Pumpkin", SOLD to Pierre 1984 190D, 2.2L, 5-spd, my intro to MBZ diesels, crashed into in 2002
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#4
10-27-2011, 02:37 PM
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If I knew off hand I would tell you... but I don't....
It is like with suspension stuff.... once you renew one... those almost as old or already ' going south' wear out faster because less of the movement is shared between them...
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html
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#5
10-27-2011, 08:23 PM
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Gee, nobody knows? I can narrow it down a little. The allen wrench going up through the bottom is an 8 or 10, and the mount is held down by a 6mm. Finding a 6 that fits in that space can be a pain...
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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 (??)
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#6
10-27-2011, 08:28 PM
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it's in the Resources section diy articles, under OM617 motor mount replacement...
PeachPartsWiki: Motor Mount Replacement
__________________
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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#7
10-27-2011, 08:30 PM
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a few things are left out of the article...
namely, YOU MUST REMOVE THE ACCELERATOR shaft from the linkage to the firewall BEFORE you jack up the motor!!!!! or you'll be replacing the pivot mount... not fun... I think the center bolt is 10mm allen LONG reach bit the two outers are 8mm I think. the nut on the shock is 10mm I think.
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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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#8
10-27-2011, 10:03 PM
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I think I have read that it is important to shoot some cleaner into that area first....and use a high quality Allen on it... do not want to round out something in that hard a place to deal with...
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html
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#9
10-27-2011, 10:05 PM
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Quote:
I remember doing the engine mounts on my 300D, walk in the park. I also replaced the engine shocks at the same time.
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#10
10-28-2011, 07:53 AM
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The sizes sound correct. I know the Engine shock bolts ar 10mm for sure. You'll als need a 6 MM wrench to hold the shock shaft while reoving the bottom bolt IRRC.
I used a 3/8 impact wrench to get ine out. Made it easy work.
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Mad_Matt's Current Stable: Oil Burners: 09 Jetta TDI The highway queen @ 105k  83 300D. Sold  Gassers: 16 A4 sport line 10 Passat 83 Recaro Trans AM WS6 Bone Stock Survivor 11 Harley Ultra 
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#11
10-28-2011, 08:43 AM
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Again, easy job. Took about 30 minutes the first set I did. Ditto on using GOOD allen tools. The cheap ones just do not fit good enough and will strip out the heads. I used a 4 foot extension on a 1/2 socked with a swivel head to break the main bolt free. worked like a charm.
Make sure you put wood between your jack and the engine... you don't want to dent up that pan. I found that getting the front of the car up on ramps, then using my floor jack gave me more than enough room to get under the car and work. Also, having a small vise grip, to hold the engine shock shaft while removing the mounting nut helps a lot.
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