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PostPosted: Wed Aug 08, 2018 6:42 pm 
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hi all, my S/C is making the rocks noise but with the belt off, there is no play when I turn the pulley - is this common and is it that little sprocket that needs replacement?

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PostPosted: Wed Aug 08, 2018 7:05 pm 
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Run it for a minute with the sc belt off. Is the noise still there?

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WHITE WHINE - IT'S INTOXICATING. 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, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 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, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser


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PostPosted: Wed Aug 08, 2018 10:13 pm 
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no I have been running about 500 klm with no belt for s/c and no rocks

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PostPosted: Thu Aug 09, 2018 1:47 pm 
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well?. does anyone have insight?

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PostPosted: Thu Aug 09, 2018 1:51 pm 
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Any grinding when you turn the pulley? That would point to a bearing. There are nose drive bearings, rotor plate bearings, and needle bearings on the intake end.

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WHITE WHINE - IT'S INTOXICATING. 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, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 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, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser


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PostPosted: Thu Aug 09, 2018 1:57 pm 
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no, no grinding, no play and it spins smoothly.....thanks

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PostPosted: Fri Aug 10, 2018 12:19 am 
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Have you checked the idler pulley & the tensioner pulley on the SC belt train?
It is very common for bearings in these to go bad.


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PostPosted: Fri Aug 10, 2018 1:20 pm 
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Roadrunner wrote:
Have you checked the idler pulley & the tensioner pulley on the SC belt train?
It is very common for bearings in these to go bad.


no, but it sounds like it comes from the blower....Ill check the tensioner,,,thanks

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PostPosted: Fri Aug 10, 2018 8:43 pm 
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WELL, the pulleys are both spinning freely so the rocks are from the blower

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PostPosted: Sun Aug 12, 2018 1:54 pm 
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ok, this may be easier to answer............if I drive with the s/c running and making the rocks noise - will it damage the blower or engine?

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PostPosted: Sun Aug 12, 2018 2:20 pm 
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Well, it's not a good noise. These superchargers aren't known to catastrophically fail, but it has happened. I'd look into getting it fixed soon. My guess at this point is that it's the needle bearings. If you don't feel like replacing bearings, a used sc isn't super expensive.

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WHITE WHINE - IT'S INTOXICATING. 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, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 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, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser


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PostPosted: Sun Aug 12, 2018 3:39 pm 
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OK, THANKS, where would I get those bearings if needed

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PostPosted: Mon Aug 13, 2018 11:02 am 
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I think you can get all the parts you need to rebuild the supercharger on ebay in a kit? That might have just been for the nose, but the bearings are available on ebay for sure. The needle bearings in the case can be R&R'd without a press, but you can't R&R the nose bearings without a press.

I'd double check that the noise is not the harmonic balancer rubber failing. The noise can be similar to the blower rock noise when it first starts to fail, as is gets worse it starts sounding like rod knock. Most people don't really notice it until the rubber has completely separated from the center pulley, and you can freely move the belt back and forth a bit by hand when the motor isn't running. The last one that failed on me the rubber hadn't fully separated - the partial bond allowed it to not be moved by hand but still made the noise - which was confusing until I inspected the balancer.

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PostPosted: Mon Aug 13, 2018 1:03 pm 
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ok, thanks for input but I am positive the blower is making the noise - no noise when disconnected.

Im gonna start by changing the oil and see if the noise changes

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PostPosted: Mon Aug 13, 2018 1:29 pm 
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Unless there's no oil in it currently, or it has cooked and congealed, the noise probably won't change.

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WHITE WHINE - IT'S INTOXICATING. 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, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 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, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser


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PostPosted: Mon Aug 13, 2018 2:21 pm 
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I will diagnose as best as I can, not interested in idle chatter...thanks

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PostPosted: Mon Aug 13, 2018 3:15 pm 
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I was trying to point out that changing the SC oil will likely be fruitless.

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WHITE WHINE - IT'S INTOXICATING. 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, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 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, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser


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PostPosted: Tue Aug 14, 2018 7:10 am 
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J Wikoff wrote:
Unless there's no oil in it currently, or it has cooked and congealed, the noise probably won't change.

I agree. Also, without the load of the supercharger, a balancer just begining to make noise may not make noise with the belt off. Try a stethoscope on each end of the supercharge with the belt connected.


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PostPosted: Tue Aug 14, 2018 1:18 pm 
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maxi426 wrote:
I agree. Also, without the load of the supercharger, a balancer just begining to make noise may not make noise with the belt off.


This was exactly what happened to me. What sounded like the supercharger ended up being the (newer) balancer.

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Runs:
'93 Pontiac Bonneville SSEi - Twincharged, manual, and lots more! Build thread
'97 Chevy Camaro - 3800, T5, T-tops, Getting ready for some major upgrades!
'05 Cadillac STS - V8, AWD, her DD
'92 Olds Trofeo - Fair weather DD
'84 GMC Sierra Classic - Twin turbo 3800
'97 Buick LeSabre - L67 winter DD
'92 Pontiac Bonneville SSE future project

Doesn't run:
'87 Buick LeSabre T-type - future victim
'67 Buick LeSabre - future victim


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