I have a M90 and one of the rear (opposite the snout) bearings on the sc is bad. Whats the best way to get those little buggers out. I have a new one and the grease and can set it to the right tolerance using a depth gauge on the existing one.
Thanks!
Supercharger bearings
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olblueeyesbonne
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Re: Supercharger bearings
Are you talking the needle bearings?
It's not a simple task, but not the hardest either.
If it's not the needle bearings (located in the housing itself at the other end of the rotors (close to TB) as the nosedrive/snout) please correct me and I will give the process you will need.
It's not a simple task, but not the hardest either.
If it's not the needle bearings (located in the housing itself at the other end of the rotors (close to TB) as the nosedrive/snout) please correct me and I will give the process you will need.
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Re: Supercharger bearings
Hi oldblueeyes!olblueeyesbonne wrote:Are you talking the needle bearings?
It's not a simple task, but not the hardest either.
If it's not the needle bearings (located in the housing itself at the other end of the rotors (close to TB) as the nosedrive/snout) please correct me and I will give the process you will need.
Yep..it's the bearings in the housing by the tb inlet. I'm thinking that tapping the hole and threading a fitting in, adding water and then air pressure might move them, or something thicker than water. Any help would be great.
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1fatcat
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Re: Supercharger bearings
You have the right idea. You tap them for a grease zerk, then pump grease in with grease gun. the gun will force it out. They can fly out with force.
Last edited by 1fatcat on Mon Dec 21, 2009 10:15 pm, edited 1 time in total.
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J Wikoff
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Re: Supercharger bearings
Here's a link from our techinfo. It should have most of what you need.
http://www.3800supercharger.net/bearings.html
http://www.3800supercharger.net/bearings.html
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Re: Supercharger bearings
I've moved some big azz things with water and air pressure, but the grease idea looks good. I'll give it a try this week and let you know how it went. With my luck I'll blow a hole in the wall and then have to pack my bags and move on again. I will stuff a towel or two into the housing...that should keep the bearing from leaving with any force.J Wikoff wrote:Here's a link from our techinfo. It should have most of what you need.
http://www.3800supercharger.net/bearings.html
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J Wikoff
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Re: Supercharger bearings
When I did it, the bearing stuck to the grease and just kinda plopped out. No towel needed if you've got the touch.
WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
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olblueeyesbonne
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Re: Supercharger bearings
Yup, that's the link I was going to add .... when I located it.
Also, what is it they say -freeze the case in a freezer so the holes open up so the new (heated) bearings slide right in with little resistance and the case will sieze onto them as it warms up and bearings cool down.
Also, what is it they say -freeze the case in a freezer so the holes open up so the new (heated) bearings slide right in with little resistance and the case will sieze onto them as it warms up and bearings cool down.
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00Beast
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Re: Supercharger bearings
Umm, marty, that's backwards. Freeze the bushings maybe? Freezing = Contraction, except with water.
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Re: Supercharger bearings
Yep...freezing shrinks and heating expands. You guys should know that!00Beast wrote:Umm, marty, that's backwards. Freeze the bushings maybe? Freezing = Contraction, except with water.
We were taught to make very close tolerance pop rivets by freezing the rivets and then under sizing the drill holes. After you put the rivet in, it warms up and you have less chance of the rivet slipping in the hole later and tearing metal. Of course we used nitrogen to freeze the rivets....also did some weird things with dipping hot dogs, tennis balls and marshmallows in the stuff.
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olblueeyesbonne
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Re: Supercharger bearings
Yeah, brain fart or inatentiveness.
Sorry -I was talking as I typed that and had a funny fealing about something but didn't quite realize I was describing it 'backwards'.
Sorry -I was talking as I typed that and had a funny fealing about something but didn't quite realize I was describing it 'backwards'.
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2001 SLE
2002 Monte Carlo SS Top-swapped FSIC Gen V TOG's, Mezeire.....
2002 GTP 40th Anniv Ed Coupe
2004 GTP Comp G 'Bottom-swapped'
Re: Supercharger bearings
Brain farts are okay...it's the diarrhea of the mouth that isn't. Thanks for being willing to help me. I will let everyone know if its a plop out of the bearing or not. I have some machining im doing also so not ready to put then new bearings in yet, but they will definitely be going the freezer tour.olblueeyesbonne wrote:Yeah, brain fart or inatentiveness.
Sorry -I was talking as I typed that and had a funny fealing about something but didn't quite realize I was describing it 'backwards'.
Re: Supercharger bearings
They popped out! Well they more like flopped out. I was hoping for something more dramatic, but it still good. Thanks!
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crash93ssei
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Re: Supercharger bearings
Hey Kevin, don't forget to clean the grease out of the housing before re-installation 
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Re: Supercharger bearings
I sure will.crash93ssei wrote:Hey Kevin, don't forget to clean the grease out of the housing before re-installation
Thanks for the reminder. I've had bearings score and slip before and they are more a PIA after that than they were before.