Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-09-2006, 10:28 PM
rg2098's Avatar
Detailing Moderator
 
Join Date: Jun 2004
Location: Rochester Hills, MI
Posts: 2,415
OM617 Motor Mount DIY

A member asked me for a write up so it is. If anyone could take photos while using these steps as well as the exact fastener sizes please forward them to me to add and complete the DIY. I have found this the easiest method after doing motor mounts a few times.

1) Remove air cleaner assembly and unclip fan shroud (don't need to remove)
2) Remove center bolt from bottom of vehicle that mounts the engine to the mounts
3) Using a light vice grips to stop the shock from turning, unbolt the engine shocks from their top brackets.
4) Remove the engine shock upper brackets
5) Jack engine up using a board across the oil pan until most of the engine shocks are out of the hole only leaving the slim post above (you may be able to use a socket extension to push it down and "hook" it under the arm)(you will see what I mean)
6) Using the large hole uncovered by the engine shock mount, remove the inside motor mount bolt followed by the outside.
7) Slip in a new mount and assembly is the reverse of assembly.

NOTES:
-Clean out the allen head bolts well and use a hammer to fully seat the socket otherwise there is a chance you round it out.
-Don't jack the engine up without removing the mount center bolt and disconnecting the shocks from the brackets.
-Don't replace the trans mount while the motor mounts are loose. (don't ask how I know)

__________________
Adam Lumsden
(83) 300D
Vice-President of the MBCA International Stars Section

Last edited by rg2098; 05-10-2006 at 12:05 PM.
Reply With Quote
  #2  
Old 05-10-2006, 01:58 AM
pawoSD's Avatar
Dieselsüchtiger
 
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 15,175
What do you do if you rounded out the central bolt inside one of the mounts (passenger side in our case)....this happened on the '83 as I was attempting to loosen it. Is there a "best way" to tackle/get that bolt out???
__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 85k - mine - (OC-85,500)
'17 Metris(VITO!) - 15k - wifes (OC-17k)
'01 E320 Wagon - 159k - mine (OC-160,000)
'01 E320 - 179k - dad's (OC-182,500)
'07 E350 Wagon - 132k - dad's (OC-132,500)
'01 SL500 - 51k - dad's (OC-52,000)
'16 E400 4matic Sedan - 60k - Brothers (OC-64,000)
Reply With Quote
  #3  
Old 05-10-2006, 02:11 AM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
Do NOT forget to undo the accelerator linkage from the firewall. We don't want that bent now, do we..........

I just had my motor mounts replaced, and I had one of the bolts rounded. The gentleman pounded a star socket into it in order to extract it.
Then he was nice enough to reuse said rounded bolt...
__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
Reply With Quote
  #4  
Old 05-10-2006, 02:22 AM
pawoSD's Avatar
Dieselsüchtiger
 
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 15,175
A star socket? Would this work well?? Or would there be a better method to removing it....
__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 85k - mine - (OC-85,500)
'17 Metris(VITO!) - 15k - wifes (OC-17k)
'01 E320 Wagon - 159k - mine (OC-160,000)
'01 E320 - 179k - dad's (OC-182,500)
'07 E350 Wagon - 132k - dad's (OC-132,500)
'01 SL500 - 51k - dad's (OC-52,000)
'16 E400 4matic Sedan - 60k - Brothers (OC-64,000)
Reply With Quote
  #5  
Old 05-10-2006, 07:52 AM
rg2098's Avatar
Detailing Moderator
 
Join Date: Jun 2004
Location: Rochester Hills, MI
Posts: 2,415
Quote:
Originally Posted by JimmyL
Do NOT forget to undo the accelerator linkage from the firewall. We don't want that bent now, do we..........

I just had my motor mounts replaced, and I had one of the bolts rounded. The gentleman pounded a star socket into it in order to extract it.
Then he was nice enough to reuse said rounded bolt...
I didn't have a problem with the linkage left on. There is enough slack and movability. It just takes a second to remove the long shaft between the firewall and valve cover and you can remove it if you want for piece of mind.
__________________
Adam Lumsden
(83) 300D
Vice-President of the MBCA International Stars Section
Reply With Quote
  #6  
Old 05-10-2006, 08:19 AM
Registered User
 
Join Date: May 2003
Location: Hunterdon County, New Jersey
Posts: 146
Don't forget to loosen the fan shroud to allow the engine to be jacked without pushing the fan against the shroud. Also, be careful that you don't bend a shifter rod (like I did) when jacking the engine.

Make sure to clean the inside of the bolt heads really well before trying to loosen them. They are usually packed with grime and the hex head does not seat well enough to work. Rounded hex heads are a REAL pain to remove!!!
__________________
Paul

1991 300TE (280,000)
1985 300TD (432,000 miles - retired)
1976 300D (225,000 - retired)
1975 300D (165,000 - retired)
Reply With Quote
  #7  
Old 05-10-2006, 10:55 AM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,353
Thanks Adam, I will make good use of this and Post Pics along the way.

I got a pretty good digital camera and several web sights to host pics, so I will digitally catalog my progress. I should start this saturday, maybe sooner!
And I think after I get the vehicle supported really well, I will pressure wash the underside of the vehicle. so don't be suprized when you can actually see the transmission mounts and bolts!
John
Reply With Quote
  #8  
Old 05-10-2006, 10:58 AM
pawoSD's Avatar
Dieselsüchtiger
 
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 15,175
I never undid my throttle linkage or shifter linkage or fan shroud when I did mine, and it came out fine..... I only jacket it up enough to just barely slide the mounts out though.
__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 85k - mine - (OC-85,500)
'17 Metris(VITO!) - 15k - wifes (OC-17k)
'01 E320 Wagon - 159k - mine (OC-160,000)
'01 E320 - 179k - dad's (OC-182,500)
'07 E350 Wagon - 132k - dad's (OC-132,500)
'01 SL500 - 51k - dad's (OC-52,000)
'16 E400 4matic Sedan - 60k - Brothers (OC-64,000)
Reply With Quote
  #9  
Old 05-10-2006, 12:06 PM
rg2098's Avatar
Detailing Moderator
 
Join Date: Jun 2004
Location: Rochester Hills, MI
Posts: 2,415
Quote:
Originally Posted by pawoSD
I never undid my throttle linkage or shifter linkage or fan shroud when I did mine, and it came out fine..... I only jacket it up enough to just barely slide the mounts out though.
Its easier to access the inside bolts with the engine high, the shroud does need to be unclipped because the fan will catch on the upper lip. The trans doesn't move that much when jacking up the engine and the shift rod is in no danger.
__________________
Adam Lumsden
(83) 300D
Vice-President of the MBCA International Stars Section
Reply With Quote
  #10  
Old 06-22-2006, 06:37 AM
JWJ JWJ is offline
Mechanically challenged
 
Join Date: Sep 2005
Location: Raleigh, North Carolina
Posts: 395
Identical?

So the left and right engine mounts are identical?
__________________
JWJ
1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG
1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG
Biodiesel, Mobil Delvac 1, and Viton fuel lines!
Reply With Quote
  #11  
Old 06-22-2006, 11:08 AM
TwitchKitty's Avatar
Я не хакер
 
Join Date: May 2004
Location: Varies
Posts: 3,892
A good first step is a trip to the steam cleaner or pressure washer.

A mention of the transmission mount is in order.
__________________
Don't believe everything you think. Especially don't believe everything that you feel. Radical Subjectivism is rampant on this forum.
Reply With Quote
  #12  
Old 06-22-2006, 11:18 AM
Registered User
 
Join Date: Sep 2004
Posts: 8,731
Quote:
Originally Posted by rg2098
Its easier to access the inside bolts with the engine high, the shroud does need to be unclipped because the fan will catch on the upper lip.
And if you continue to raise the engine after the fan hits the shroud, something has to give. How difficult is it to remove two clips from the shroud? No more difficult than disconnecting the accelerator linkage, which is also a very smart thing to do.
Reply With Quote
  #13  
Old 06-22-2006, 01:13 PM
Raleigh, NC
 
Join Date: Jul 2002
Posts: 16
Jwj....

Hey, I'm in Raleigh NC also.... I just replaced the motor mounts on my 83 300D weekend before last. Yep, they are both the same. I reused the original heat shields, also of note, I had to cut down a L-shaped allen wrench to fit in there... I only removed the engine shock on the drivers side, as I remember.
Call me voice if you need anything... 919-291-4195 cell.
__________________
Steve Ayscue
'83 300D
'87 300SDL
'98 Dodge Ram Diesel
22' Hydrasport
Reply With Quote
  #14  
Old 10-04-2006, 12:04 AM
ncof300d
Guest
 
Posts: n/a
I changed mine mounts on Madeline tonight. I just removed the air cleaner, unclipped the radiator fan shroud, and unbolted the engine shocks. Accessing the inside bolt of the two smaller hex head bolts on the IP was a stinker. Next time I think I will cut the bend off of a 8mm and 10m Allen wrench and use than on a ratchet so that I have a long narrow tool to access the sockets. The job took about three hours by myself. With the modified tools that I mentioned I probably could have cut 40 minutes off the job.
Reply With Quote
  #15  
Old 05-20-2007, 01:28 AM
Registered User
 
Join Date: Sep 2006
Location: Midwest
Posts: 66
Replaced mine on my 240d tonight, I should put pics up of my drivers side mount. Terrible. I was unable to fit the heat shields back in, because I didn't unclip the shroud or remove the shocks, so I couldn't get the engine high enough, looking back its probably not a good idea, but mounts are cheap if they go bad and my car drives like new now... Definitely difficult to get to the hex under the IP but everything else went rather smoothly.

__________________
1977 240d 4-speed ~200k
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 07:57 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page