kjlindgr

I had the engine apart for a routine rebuild, so I decided to take the time to replace the oil in the supercharger as well. It was pretty straight forward, and it has been done a few times by some members here. I figured that 50K miles of gear-mashing mayhem was worthy of freshing up the lube.

Again, I had the supercharger off of the engine for part of this so the emptying part was easier I'm sure. I've heard of people using syringes with hoses like I used to literally suck the old oil out. That should work pretty well too.

On with the show:

Here is the oil inlet/drain. Standard Allen plug...no hanky-panky:



With the supercharger off, I was able to just tip and drain the oil out. Again, this was the easiest way possible...but sucking it out would work well too:




Mobil Jet Oil II is the recommended oil for the supercharger. I got it off of an aviation supply web site (www.airplaneoil.com). I ordered two quarts just because I had no idea how much it would take. I used less than one quart.




I bought a syringe from a local farm supply house and some small flexible hose. I think the syringe was intended for cows or enimas or something. It was an appropriate size (35cc). and wasn't overly large or small. The can is weird...like a soup can. I opted to just punch a hole in it versus trying to "open" it.




I packed some shop rags down below the hole and continued to suck and fill until it oozed back out the drain plug I removed. It didn't take much to fill...probably less than half a quart. There was quite a difference in color and smell so I'm glad I opted to pull the old oil out.





Basic stuff and pretty straight forward.


Enjoy!

B on my Benz

nice! when is it normal for us too change the supercharger oil??

kjlindgr

As far as I know, there isn't a normal service interval for the S/C oil. I've heard some say it's not meant to be changed. Mercedes indicates what brand/blend of oil to use in their maintenance manual so I'm assuming it is "supposed" to be changed at some point. I'm not sure what to believe...so I changed it. Worst case, it's got fresh oil.

benz_addict

great post! I just did this 2 days ago. The old oil smelled like goat, like barn smell. Disgusting.

AgSilver

The oil can is standard if you remember metal oil cans. You would use an oil filler spout which punctures the can and allows you to pour the entire contents of the can into whatever you're filling. I've owned turbine powered aircraft and I will tell you that they run much, much hotter and under far more severe conditions than these superchargers. Most turbines and turbojets require an oil change (exactly the same oil) every 500 hours of operation or every 12 calendar months. So I would say you may want to change you supercharger oil about every 3 years. Remember, these superchargers operate intermittently.

shardul

iTrader: (1)

Awesome DIY thank you.

kjlindgr

It does smell literally like animal poo. I spilled some on a shirt I was wearing and had to throw it out. I poured the fluid into an oil pan and after dumping it out, my garage still smelled like dung.

AgSilver

That's definitely Jet II

shardul

iTrader: (1)

quick question, can the drain/fill plug be accessed when the s/c is still on the car?

cahiil55k

Thanks for the detailed write up. I've had alot of experience with Eaton superchargers and a huge mistake would be to overfill the supercharger. Other than refilling just the amount of old oil that came out, would anyone know how much oil is recommended by the manufacturer?

kjlindgr

Yup, I had it installed in the engine when I was filling it. I wanted to make sure it was level and not over filled for this reason. With a long ball-end allen, it's cinch to get at.

shardul

iTrader: (1)

thanks man. If i cannot find the Jet Aviation Oil II locally, would you want to sell the extra quart you have. That is if you dont have any use for it.

kjlindgr

Absolutely. I'm not going to use it for anything. Just PM me and we'll get 'er dun.

shardul

iTrader: (1)

so basically the level of oil in the s/c casing is right at the drain plug? If it is higher than that wont it be hard to refill while on the car?

kjlindgr

The oil level is at the height of the drain plug. It's like a differential...the fill hole indicates the oil level height. But yeah, if it were to need more fluid, it would be impossible to fill with the S/C on the car.

shardul

iTrader: (1)

thanks i am calling around local stores right now. seems like no one answers the phone. will pm you if i have no luck

kjlindgr

Perhaps businesses just don't need any money. I get that a lot here too.

But yeah, just hit me up if you can't find anything. Otherwise, I'll probably just give it out for Halloween.

brads25

Does anyone know where I can get a replacement fill screw? My ball end allen key wasn't as "magnetic" as I first thought.

I'm fishing around for it today with a pickup stick so hopefully I'll find it but please let me know if it's a standard metric one, or has a flanged face etc.

So annoying and nooby I know.

slownrusty

Great thread and post kjlindgr (like most of your threads are!). I will definitely embark upon this service soon, as I work with ExxonMobil, I will have to ask the local availability of the Jet Oil.

How is the engine rebuild on E55 and the RB FD?
Yasin

£ C43 £ AMG £

Thanks for the very useful write up, how long does it take with the charger on the engine......30mins?

WOW
I love the fact that you can do a routine maintanance engine rebuild . A full service takes me quite a few hours.

kamilclk430

Great DIY Thread thanks for the detailed info.

WHTEVO

Thanks for the info. I need to do this since i am sure its never been done.

Aaron

AMG_RL

Excellent write up thanks so much for this. Any difference in engagement or feel for those who have done this already?

pearlpower

I'm just amazed at how many people know what a goat and a barn smells like. LOL. City folks you know.

aghakauve

They have OEM fluid at the dealer.. Part number is A 000 989 62 01