M119 Rear Main Seal Installation Tool STL File (for 3D printing)

[babenaldt]

Hey Guys,

I recently replaced the rear main seal on my car and I designed a 3d printed installation tool.

The STL for these files are posted here: Mercedes M119 Rear Main Seal Installation Tool by Babenaldt | Download free STL model | Printables.com

I basically copied the design of the factory tool. My first attempt at this broke, you need to print the "Body" component with high infill and you need to ensure good layer adhesion.

Let me know if y'all have ideas on how to improve the design of the tool!

Cheers!
Sean

 

[gsxr]

Nice work! Was that a Victor orange seal?

A number of years ago I ran into problems replacing the rear main seal. I used an orange Victor seal that pressed in place quite easily, not much pressing force was needed. Unfortunately after a few hundred miles, it backed out! I had to repeat the job. Photo below shows the orange seal after it backed out. Hopefully this was a fluke and you won't have a similar issue.

By comparison, the OE/Genuine Mercedes seal (made by Bruss) was extremely tight and required significant force to press in place with the tool. I'm not sure if a 3D printed tool would survive with a Bruss seal.

 

[gerryvz]

I have said for many years, and this is confirmed from German friends of mine with experience, that Victor Reinz seals should generally be avoided, unless they are the ONLY option. MB factory or Elring seals are ALWAYS preferred for critical applications like this.

 

[babenaldt]

That is the Victor Reinz seal, ill order the OE part now and replace it while the transmission is out of the car!

 

[babenaldt]

Update on this thread. I just successfully installed the OEM seal using this 3d printed tool, but I'm going to revise my instructions because the OEM seal is definitely a tighter press fit.,

Ensure both components are printed with a high infill percentage as well as multiple perimeters and utilize a large flat washer underneath the tightening bolt. I experienced a bit of cracking on the plunger component during the installation due to the high bearing stresses of that bolt. This cracking didn't preclude me from installing the seal but I would not be able to reuse the tool for another installation.

 

[Glen]

What type of filament did you use?

 

[babenaldt]

Nothing fancy, just PETG

 

[190EVAN]

This is awesome!

I'm going to throw it on my printer tomorrow and see how it works with solid infill.

Do you by chance have a Solidworks file or CAD drawing of any kind indicating dimensions of the holes from center?

I could always reverse engineer your STL but I figured if you have the file, I could use it to machine some in my on my lathe. If you do have file and I have spare materials on hand to make two, I would make you one out of metal as payment!

 

[babenaldt]

This is awesome!

I'm going to throw it on my printer tomorrow and see how it works with solid infill.

Do you by chance have a Solidworks file or CAD drawing of any kind indicating dimensions of the holes from center?

I could always reverse engineer your STL but I figured if you have the file, I could use it to machine some in my on my lathe. If you do have file and I have spare materials on hand to make two, I would make you one out of metal as payment!

I included the fusion design files as well as a step file to the Printables repo. Either one of those should import into solidworks and play nicely with the measuring tools.