theeddie

This writeup is to fix the supercharger pulley bearing.
If you hear god awful noises coming from the supercharger pulley which sound like grininding your bearing is going out.(dont confuse this with the supercharger squeak).
Replacing the bearing will probably not fix the supercharger squeak, but for some reason when i replaced the bearing on mine the squeak stopped. but this is only day 1.

bearing should be about $50 shipped or less


Tools needed
1. Torch
2. strap wrench
3. 15/16 socket and breaker bar
4. bench vise
5. 26mm socket (i think thats the size)
6. rubber mallet
7. keep old bearing you will need it to install the new on.


Step one
Open hood lol

Step two
pull off engine cover

step 3
Remove outer drive belt

step 4

Fire up the torch and heat the supercharger pulley bolt.
The bolt has loctite the heat will melt the loctite to make bolt removal easier.
be very careful with the torch in the engine bay area. target just the bolt heat for 30-45 secs. Keep fire exsingusher on standby just in case.

step 5

use strap wrench and 15/16 socket to undo supercharger pulley bolt.
remember righty tighty lefty lucy.

or go up a little higher and use an impact!!

step 6
remove supercharger pulley

step 7
Remove the snap ring with some pliers at the from of the pulley.

Step 8
place pulley between bench vise, (grooves facing down, backplate facing your face)
vise does not have to be tightened to much just enought to hold in place for the beating you about to give it. MAKE SURE PULLEY IS RESTING ON THE SHINY SILVER PART NOT THE DARK METAL PART AS THE DARK METAL PART HOLDS TENSION)

step 9

place 26mm socket inside pulley and hammer out the bearing with a mallet.

step 10
clean the inside of the pulley

step 11
rub inside with a light film of grease

step 12
place new bearing inside then put a towel on top then put old bearing on top of that and hammer in the new bearing half way. take the old bearing off, then continue hammering in with the towel on top till the bearing is seated.

step 13
put snap ring back in

step 14
install pulley back into supercharger

step 15
put loctite on supercharger bolt thread then bolt on.
40lb torq or 60 nm

step16
put cover on the close hood.

step 17
go grab a drink and a snack
wait 30min for loctite to set

step 18

crank the benz up
mission accomplished

takes only 30 min at most

ill upload some pictures soon
This is similar to the c32 bearing installion except the bearing come through the front of the pulley.

Toadster

justinwrock

I called Nachi directly, and there is a warehouse in Los Angeles that has these bearings in stock! they have quite a few in stock as well!

Paid $42 and some change for my bearing locally, and was able to get it the next day! (I bought two just in case I screwed up the install....)

It is exactly like theeddie posted, but I didn't use a torch to heat the bolt. I did undo the motor mounts, and raise the engine a few inches to get the impact on the bolt. I did wrap the bolt in teflon tape and put loctite on before re-installation. Also installed a new supercharger belt while I was in there.

As for more power - seat of the pants dyno is unchanged. I will say the supercharger doesnt chirp when engaging, and engages with more force.

alextaylor29

My bearings went out luckily when I started her up in the garage and the engine was really loud! I flatbedded it to the dealer and they replace everything including the SC Clutch under my extended CNA warranty. All I paid was the $75 deductable and the tow was free because I have AAA.

With a new clutch bearings now there is no SC, "Chirp" I used to have and it runs great.

Glad this ended well for you!