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  #1  
Old 10-17-2016, 09:26 PM
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B2 Piston Cover Leaks 91 300TE

1991 300TE, non-4Matic, 259,XXX miles.

Shifts excellent and fluid looks good but it leaks/drips from the B2 piston cover. I'd like to re-seal it as it's more than seepage. Is fixing the leak opening a can of worms? What parts are needed to fix it? Just the seal? New cover?

Any tips on the procedure?

Any advice is appreciated! Thanks!

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  #2  
Old 10-18-2016, 08:02 AM
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Location: Northern, Virginia
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It is possible to replace the oring with the transmission in place, but it is a tight spot. There are a few pictorials available, dieselgiant comes to mind, but I can't help you search for them just now. One tip I can add that I don't recall seeing in the pictorials is to liberally grease the replacement oring to get it to stay in place when putting the cover back on. Use a thick grease, something about the consistency of Vaseline.

Here is the link. You don't need to go beyond just replacing the red orind as show.

http://www.dieselgiant.com/Mercedesb2pistonsealreplacementl.htm
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80 280SL
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90 300TE 4Matic
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  #3  
Old 10-18-2016, 08:24 AM
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Thanks pwogaman.

Can the piston be kept in place so the pushrod stays in position when replacing only the cover o-ring?
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Old 10-18-2016, 10:05 PM
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Yes
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Peach Parts W124.128 User Group.

80 280SL
85 300SD
87 300TD
90 300TE 4Matic
90 300D 2.5 Turbo
92 300D 2.5 Turbo
92 300TE 4Matic
01 Saab 9-5 Wagon
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  #5  
Old 10-18-2016, 11:47 PM
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Location: El Dorado Hills, CA, USA
Posts: 418
I concur PW. The B2 will not pop-out, nor is it spring loaded..

All the best,

Martin

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