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Old 06-27-2002, 08:05 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 18,745
M103 rear crank seal

Is the special tool absolutely necessary to replace the rear crank seal of an M103 or can it be tapped into place?

Would it be better to remove the seal carrier and press the seal in off the car? Is there a risk of tearing the oil pan gasket?

91 300SE
87 300SEL
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Old 06-27-2002, 08:17 PM
Senior Member
Join Date: Apr 1999
Location: Walnut,CA,USA
Posts: 554
Yes you can put in a new seal without special tool just remove rear crankshaft seal cover punch oil seal out install new seal,seal the cover with sealer.
MB STARS Master Guild Technician,17 years MB tech
14 years independent shop owner
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Old 06-27-2002, 08:23 PM
engatwork's Avatar
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,234
- and consider replacing the front tranny seal while you are in there - getting there is the costly part
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Old 06-27-2002, 09:19 PM
Michael's Avatar
Join Date: Jul 1999
Location: CT, USA
Posts: 2,699
Actually, what leaks in there (besides the rear main) is a large O-ring seal inside the front pump. I wouldn't mess with the trans input seal without having a pro go in and do the job right. I've been here several times with my M103 TE
"If everything seems under control, you're simply not going fast enough" --Mario Andretti

1995 E500 street car
1986 Porsche 944 Turbo S track car
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Old 06-28-2002, 06:57 AM
engatwork's Avatar
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,234
Learn something everyday - I was under the impression it was the front tranny seal Michael. Thanks
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