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#1
01-11-2003, 10:18 PM
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Motor mount replacement - how tough and where to find step by step
I'm on a mission from God to being our 1984 300SD back to respectable shape and tight on funds. Are motor mounts something I can handle if I'm a decent wrench? What issues / special tools might I need to have?
I don't have access to a lift - just a floor jack / normal size garage. Any good place to read about the procedure?
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~shell As of 2/2010: 2001 CLK55 0o\=*=/o0 13.6 @ 106mph 10K mi 1984 300SD 260K mi and going and going... 97 S600 46K miles 1991 Sentra SE-R (extremely dorked with) www.se-r.net 
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#2
01-11-2003, 11:41 PM
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Chris 1985 300SD - 'Grace' (198K mi.) 2018 Honda Civic Sport 2018 Honda CRV LX 2010 Honda Fit Sport (RIP) 2013 Honda Accord Sport (Sold) 1996 Lexus LS400 (Retired) 1995 Ford Contour SE (Retired) 1976 Porsche 914 (Sold) 1972 Datsun 240Z (RIP)
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#3
01-12-2003, 02:30 AM
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Great write-up!!
I'm wondering, though...how do you tell if the engine shocks are bad? I'm sure I need to do my engine mounts; that's a "someday" project; I'll probably do the tranny mount at the same time...
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2001 VW Jetta TDI, 5 speed, daily driver 1991 Ford F-350, work in progress 1984 Ford F-250 4x4, 6.9l turbo diesel, 5 speed manual Previous oilburners: 1980 IH Scout, 1984 E-350, 1985 M-B 300D, 1979 M-B 300SD, 1983 M-B 300D Spark-free since 1999
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#4
01-12-2003, 05:11 PM
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thanks!
you rock - that is what I was looking for!
the service writer had told me that I'd keep breaking the air cleaner bracket as long as the mounts were bad - the engine would just rock too much makes sense I guess - I just got and air compressor and was wanting a project to try them out on 
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~shell As of 2/2010: 2001 CLK55 0o\=*=/o0 13.6 @ 106mph 10K mi 1984 300SD 260K mi and going and going... 97 S600 46K miles 1991 Sentra SE-R (extremely dorked with) www.se-r.net
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#5
01-12-2003, 05:21 PM
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The newer glycol filled mounts are different (easier) -- they are semispherical, metal on top and tapered rubber underneath. It will be obvious if you have them. I know they are used on the 603, don't know of all W126 diesels have them or not.
They held in by one bolt from underneath and one bolt from the top. Loosen both, then jack engine and remove bolts, swap mount in, paying attention to the fact that there is a "key" in the top attachment. Screw bolts partway in, lower engine, and repeat for other side. Snug bolts up tight when engine is seated properly. I watched Hans do this one afternoon (on the lift, of course) -- took maybe 20 min. Took longer to run the lift up and down that change the mounts! No fiddly little 6mm cap screws with dirt in the hole, up there under the bracket where you cannot reach them! Peter
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1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs!
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#7
01-12-2003, 07:48 PM
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They are available on FastLane, but they are NOT interchangeable with the old style mounts, the frame is different. Too bad, I'd replace ALL of mine! I think they are like $60 apiece.
Peter
__________________
1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs!
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