Replacing the rear main engine seal. - PeachParts Mercedes-Benz Forum

winmutt · #1 02-21-2008, 09:11 AM

Quote:

Originally Posted by Diesel911

Look at page 8 for installing the main bearing seal
http://www.pauldrayton.com/uploadfiles/merc/Service/W123/w123CD2/Program/Engine/617/01-310.pdf

To remove and install the upper rope type main bearing seal:
Sneaky Pete Oil Seal Remover / Installer Features: Removes & installs upper rear
main seals without dropping crankshaft. Includes everything needed

http://www.amazon.com/Sneaky-Pete-Seal-Remover-Installer/dp/B000X01ZJM

I used a similar product 1 time on a 235 chevy engine and it worked the 1 time I did it.

So upper oil pan still has to come off with this or?

Stevo · #2 02-21-2008, 10:22 AM

You MUST pull the engine too get the upper oil pan off, which you need too do to get the crank out so the seal can be replaced. No "seal remover" needed.

DeliveryValve · #3 02-21-2008, 10:46 AM

winmutt's engine is already out. But this tool is said to allow one to get to remove the other half of the rope seal that is under the crank. I say "under" because the engine should be on the stand upside down with the upper oil pan off.

Stevo · #4 02-21-2008, 10:58 AM

Quote:

Originally Posted by DeliveryValve

winmutt's engine is already out. But this tool is said to allow one to get to remove the other half of the rope seal that is under the crank. I say "under" because the engine should be on the stand upside down with the upper oil pan off.

Gotcha, but there is a little "spike" that sticks up that keeps the seal from being pulled "around", must be lifted up. I dont think "Sneaky Peat" can deal with that. Anyway if the engine is out on the stand its not much trouble to look at the bearings and then re torque the caps.

Diesel911 · #5 02-21-2008, 04:00 PM

Quote:

Originally Posted by DeliveryValve

winmutt's engine is already out. But this tool is said to allow one to get to remove the other half of the rope seal that is under the crank. I say "under" because the engine should be on the stand upside down with the upper oil pan off.

I think the the "under" part may be a typo error in the add as the tool is made for changing the seal with the eingine in the frame (which is the way I used it in the past).
Also the first web site I posted is a Free Factory Manual site so that someone could look and see how MB wants the job done. Page 8 of the pdf has the part about replacing the rear main seal.
Removed by request

The 2nd I posted was the "Sneaky Pete" add at Amazon.com.

Diesel911 · #6 02-21-2008, 03:40 PM

Quote:

Originally Posted by winmutt

So upper oil pan still has to come off with this or?

Yes the oil pan will need to come off.
Also I think there must be an error in the "Sneaky Pete" add. The tool is to remove and install the upper rope type main bearing seal. Meaning the part of the seal that is I the engine block. The lower part of the seal in my case was in the lower rear main bearing cap and that was removed and installed in the normal manner.
To remove the upper one you use the corkscrew device and twist it into the roap seal and slowly pull it out. If it will not pull out easily loosen ther rear main bearing cap which will allow more play between the crank and the seal and pull it out.
Again I only used this one time back around 1974 on a 235 chevy PU truck engine. It worked for that application.
If this information is not deemed good for a Mercedes the info might be useful to other members with their other vehicles.