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  #1  
Old 02-18-2008, 07:31 PM
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Front seal replacement

Hey guys,

Have not been on here in a while, could not remember if there was a link to help me with replacing the front crank seal. Going to do that and the oil pan at the same time.

What all do I have to do to R&R the front seal???

Thanks Doc.

Sorry guess it would help if I told you what the car was...

1983 300SD
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  #2  
Old 02-18-2008, 07:39 PM
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Except for aligning the balancing disc when reinstalling, it's a very easy job. I would recommend that you also plan on replacing the crankshaft spacing ring.
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  #3  
Old 02-18-2008, 07:44 PM
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Ok,

I have done other car, but not a MB. Where is this spacing ring and is there any pictures of the front of the engine that is expoded???

Doc.
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  #4  
Old 02-18-2008, 08:19 PM
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The spacer is on the crankshaft behind the balancing disc. The seal lip actually rides on the spacer. Typically, the old seal will have worn a groove in the spacer, so a new one will go a long way toward ensuring that the new seal does not leak. Sometimes, the wear is offset from the center of the spacer enough that the spacer can be reversed and reused. Other times, the wear is too close to the center and you need a new spacer. Apparently, not all seals are created equally when it comes to depth.

http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=2AT0J1QHK2AX17B7Y0&year=1983&make=MB&model=300-SD-002&category=A&part=Crankshaft+Seal+Spacer
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  #5  
Old 02-18-2008, 11:47 PM
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Replacing the 300TD front crankshaft seal and other front of block oil leaks

http://www.peachparts.com/Wikka/OM617CrankshaftSeal

A couple of post on the job.

Dave
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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car
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  #6  
Old 02-19-2008, 12:01 AM
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Be careful with the dowel pins on the crankshaft. There are a number of posts explaining how to install them correctly. It's a known failure point and a challenging repair if anything goes wrong.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #7  
Old 02-19-2008, 12:23 PM
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Are there any other gaskets that I need to replace or should I be ok just replacing the seal???

Doc.
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  #8  
Old 02-19-2008, 12:37 PM
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Quote:
Originally Posted by slojoexxx View Post
Are there any other gaskets that I need to replace or should I be ok just replacing the seal???

Doc.
What did you mean when you mentioned that you were "going to do the oil pan at the same time?"
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  #9  
Old 02-19-2008, 05:48 PM
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Quote:
Originally Posted by slojoexxx View Post
Are there any other gaskets that I need to replace or should I be ok just replacing the seal???

Doc.
Should be all you need, for the crank.
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84 CD
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  #10  
Old 02-20-2008, 01:08 AM
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If your going to the trouble of moving everything for the front crank you might as well so everything in the front of the engine. See my post above.

Dave
__________________
1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car
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  #11  
Old 02-22-2008, 12:28 PM
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Location: Valley Center, Kansas
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Sorry guys, didn't mean to leave you hangin..

My lower oil pan has been leaking also, so I am going to do it along with the seal.

Once again thanks for all the help and links..

Doc.
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  #12  
Old 02-22-2008, 02:26 PM
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In that case, you might consider renewing the turbo drain grommet and seals.
And possibly the oil pump pick-up screen, depending on its condition.

I might add that there are a number of other items that can leak oil that runs down to the lower oil pan gasket and make it appear that the gasket is the culprit, when it's not.
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