Has anyone replaced a B2 piston? I think I may attempt it to resurrect the 300 D. Is it do-able by a novice?

very easy. the hard part is getting the little clip out to take the cover off. be ready to get covered in tranny fluid.

__________________
have no worries.....President Obama swears "If you like your gun, you can keep it

http://dieselgiant.com/Mercedesb2pistonsealreplacementl.htm

thanks carusle! I'll let you know how it goes.

I've got leaky cover. Can the seal for the cover be replaced without having to worry that the pushrod is not engaging the brake band since I will not be removing the piston?

__________________
Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

Yup, there's plenty of documentation on it online. For me the hardest part was pulling out the seal holding in the B2 bushing. I destroyed the #@&^ thing, had to order another one through MB while my car was on jackstands. You'll need the B2 piston, nylon B2 bushing, and the B2 bushing seal just to be safe. Bushing & seal were under $10. I'll try and get part numbers for you if my webmaill server decides to work one of these days .

I also hear it is easier to remove the valve body and tap out the old bushing, I just yanked it out through the B2 opening. Getting the circular clip off wasn't too bad - the trick is to wedge something in between the trans tunnel and B2 cover, insert a flathead screwdriver at about 5 o'clock and pop it out. It was moderately harder to get back in while depressing the cover. Overall an easy job, just messy and easy to contaminate with dirt.

Oh hey this thread was 3 years old....whoops. Oh well. I'd definitely take it out to make sure. It's really not that hard--good time to make sure you've got the nylon bushing too.

__________________
TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth

This trans was fully rebuilt and never filled let alone driven. I believe the seal for the cover was damaged or knocked out of place when it was installed. I need to just replace that seal and that's all.

__________________
Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

Is the transmission in the car? If it is not, it would be easier pulling the whole piston. If it is in the car, you could try to lodge something in between the cover and trans tunnel to keep the cover depressed, that would be your only chance at getting at the o-ring, but I believe it is too far in there to be removed without taking off the cover. I haven't crawled under the car to see if that method is do-able yet. See post #3, exact job you want to do.

__________________
TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth

It looks doable according to Diesel911 here:




All I need to do is replace that red o-ring.

__________________
Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)