1st Gen Supercharger nose cone Rebuild and Mod

Rockdawg84

New member
Disclaimer: For info only. work on your supercharger at your own risk!!!!!

So last year I sent my supercharger off to have it fully rebuilt including Rotor coating. When I got it back it ran sweet and like a dream. But it's always had a little bit of oil seep from the front nose cone seal. Yes I know that I should have done something about it right away but I didn't. So because of it being a first gen (grey) supercharger I couldn't just add oil to the nose cone like if it had been a 2nd gen (black) supercharger. I meant to deal with it I really did but some stuff came up and suddenly the bearings were making noise. So I began doing a lot of research because I didn't want to drop the money on a nose cone rebuild. Well I got lucky enough to find a company that sells all the parts to do a nose cone rebuild. Rolling Performance Home not bad to get all the parts for under $80 but I was sure I could do even better than that. So after much research I found the bearing part numbers and found a great set of Nachi on Ebay for about $8 each.
IMG_2981.jpg~original

then for $12 got the good new front seal from rolling performance since I couldn't find the part number anywhere. Oil and anaerobic gasket maker came to about $15 so I was out about $42 and got an adventure in supercharger land. I got my good friend and ASE master mechanic to help for insurance.

First you DO NOT have to remove the whole supercharger to get the nose cone off. Remove the upper radiator clamp on the engine side and slide it back don't remove the hose. Then remove the belt and supercharger tensioner. Then you can remove the timing cover and gain access to all the nose cone bolts. Be sure to put a towel under he nose cone as any oil will come out as you remove the nose cone. Once off the pulley can be removed and the front seal can be removed by taking out he snap ring and then removing the seal. Then the bearing shaft needs to be pressed out.
IMG_2972.jpg~original


Then the coupler end of the shaft needs to be pressed off so you can get to the back bearing. Be careful to keep the springs as they put preload on the bearings.
IMG_2982.jpg~original


IMG_2983.jpg~original


Then you can press on new rear bearing, spring and the coupler back on the shaft. Be careful the coupler and shaft are splined and you don't want to mess them up.

before putting everything back together I decided we were going to drill and tap the nose cone so that oil changes could be done without removing it.
So using a 7/16" drill bit we carefully drilled through the top of the nose cone. then used a 1/4"-18NPT tap we tapped the hole to accept a 1/4"-18npt plug.
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IMG_2984.jpg~original

now I can change the oil anytime I want using a syringe and small tube to suck out the old oil before putting new oil in. A big thanks to my friend Marc for all his work on this project.
 
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i have often wondered why someone has not done this yet, i mean i know the parts are out their, that nose cone is rebuild-able, it has to be. anyhow great wright up and thanks for the info, this is wonderful and has opened the door for me to looking at first gen SC also now. thanks a ton man!
 
The way you dive into stuff that scares the willies off most of the rest of us is inspiring. I want to be you when I grow up.
LOL thanks. I rarely dive into a project without first doing a ton of reading from other guys and the way they did it. There are so many Eaton M62's out there and they are on everything from Mini Coopers to BMW's and GM V6's there is a lot of info if you're willing to wade through it all. and really once we were into the tear down we realized that it wasn't very complicated. Also it is much easier to be brave when you have a ASE Master Mechanic and Machinist working with you.

i have often wondered why someone has not done this yet, i mean i know the parts are out their, that nose cone is rebuild-able, it has to be. anyhow great wright up and thanks for the info, this is wonderful and has opened the door for me to looking at first gen SC also now. thanks a ton man!

Thanks and honestly with this little mod of adding an access plug to the nose cone there is no practical reason to go with a 2nd Gen over a 1st Gen SC. Once the hood is closed they work exactly the same. There is more to come I actually am replacing the rear rotor bearings as well.
 
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What fuel upgrades have you done? Im up here in Phoenix with a first gen S/C and keep getting a bank lean code. Was thinking maybe im running out of fuel. Stock pulley.

Also what p/n did you use to oder the seal. I did not see it on there web site. I just ordered the bearings so im gonna give it a go. thanks for all the help.
 
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What fuel upgrades have you done? Im up here in Phoenix with a first gen S/C and keep getting a bank lean code. Was thinking maybe im running out of fuel. Stock pulley.

Also what p/n did you use to oder the seal. I did not see it on there web site. I just ordered the bearings so im gonna give it a go. thanks for all the help.

I agree you are not getting enough fuel or you have a vacuum leak on that bank. That mean's bad or partly clogged injector for fuel. My runner went 180k with a stock pulley and no fuel mods and I never threw a code so I wouldn't do fuel mods till you figure out what is causing that.

On the rollingperformance site the seal is under Supercharger couplers & accessories
 
hey you have a link or something for the bearings I'm rebuilding my SC soon and unable to find the right ones or looking up the wrong part number.
 
Just do a ebay search for "6303 ball bearings" then chose a open bearing in a C3 variety. then repeat for "6204 ball Bearings". Good luck with your search
 
Have you done the rear bearings yet? Also do you know where to get the other gaskets or seals for our units? The elbow that comes out the top plate on mine has begun to suck air. Thanks for any help.
 
Have you done the rear bearings yet? Also do you know where to get the other gaskets or seals for our units? The elbow that comes out the top plate on mine has begun to suck air. Thanks for any help.

Sorry, my hard drive crashed and I havent been on in a while. I did do the rear bearings mine were screaming like a banshee. I pressed them out and then matched them on Ebay. As for the rest of the seals I found a guy who specializes in eaton SC'rs but I have lost all my bookmarks so I will have to find it again. It wasn't to bad and I totally worth doing on my own.
 
Thanks for the reply rockdawg. Let me know if you find his contact info. I will keep looking as I need to get mine re sealed.
 
Glad I found this thread.
My 1st Gen SC was installed at birth and she now has 153K on her.
I have been meaning to change the snout oil for years now, but The thought of pulling the whole SC has put me off. Fortunately, it purrs like a kitten and is not giving me grief.
I did purchase this kit over the summer:
Eaton M62 supercharger Snout Rebuild Repair Bearing Kit | eBay
I have always assumed I could just pull the nose cone off, replace everything, drill and tap a plug in the top and reassemble.
Now I know I can. Thanks.
 
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Just wanted to chime in and mention that I rebuilt my 1st Gen SC snout about 5k miles ago with the rolling performance bearings (koyo) and they're already screaming again...I plan to pick up the Nachi bearings from ebay and see if I have better success with them.

If anyone is looking for the rear bearings here are the part numbers I have for them (I also got them from rolling performance):

f-65477.1 / 6002544
 
Glad I found this thread.
My 1st Gen SC was installed at birth and she now has 153K on her.
I have been meaning to change the snout oil for years now, but he through of pulling the whole SC has put me off. Fortunately, it purrs like a kitten and is not giving me grief.
I did purchase this kit over the summer:
Eaton M62 supercharger Snout Rebuild Repair Bearing Kit | eBay
I have always assumed I could just pull the nose cone off, replace everything, drill and tap a plug in the top and reassemble.
Now I know I can. Thanks.

Looks like a good kit with Nachi bearings
 

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