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 Write-Up: Supercharger Coupler Replacement (Series II)

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Jack the R
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Sun Jun 10, 2018 7:27 pm

FWIW here's what the SC gears sound like -



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Abaddon
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Mon Jun 11, 2018 8:59 am

Yeah, that snout bearing is (was) definitely shot!
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Jack the R
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Mon Jun 11, 2018 1:39 pm

It's on a truck to INTENSE now . . .
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LARRY70GS
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Sat Jun 16, 2018 10:24 am

Gonna attempt this soon. I know you need to move the alternator out of the way to get to some of the bolts. Do I need to disconnect the battery?

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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Abaddon
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Sat Jun 16, 2018 10:50 am

LARRY70GS wrote:
Gonna attempt this soon.  I know you need to move the alternator out of the way to get to some of the bolts.  Do I need to disconnect the battery?

If you're moving the alternator, I'd disco the battery. Actually, just disco that B+ junction in the RF engine bay. Wrap a rag around it or something so it doesn't arc out on stuff.
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LARRY70GS
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Sat Jun 16, 2018 10:54 am

Abaddon wrote:
LARRY70GS wrote:
Gonna attempt this soon.  I know you need to move the alternator out of the way to get to some of the bolts.  Do I need to disconnect the battery?

If you're moving the alternator, I'd disco the battery. Actually, just disco that B+ junction in the RF engine bay. Wrap a rag around it or something so it doesn't arc out on stuff.

Thanks Scott.

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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LARRY70GS
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Sat Jun 16, 2018 3:26 pm

Just finished up. Took me 2 1/2 hrs. start to finish. Not a bad job, but you need a deep well 10mm socket for sure. One of the bottom bolts has limited access with the alternator mount in the way. I ended up just going under the seat and disconnecting the negative battery lead. Got almost all the oil out, but it's still a stinky job. Ripped the SC gasket in front of course, doesn't look like it seals anything anyway.

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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Jack the R
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Thu Jun 21, 2018 12:18 am



SC snout freshly rebuilt by INTENSE. No more noise but it doesn't spin very freely, which is surprising, but since it's INTENSE it's probably right.
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Abaddon
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Thu Jun 21, 2018 8:21 am

When the bearings are new, they won't free spin. Same thing for a hub bearing. Usually, if they free spin, they're bad.
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Thu Jun 21, 2018 1:48 pm

Abaddon wrote:
When the bearings are new, they won't free spin. Same thing for a hub bearing. Usually, if they free spin, they're bad.

How about alternators?

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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Thu Jun 21, 2018 2:00 pm

turn the alt pulley with your fingers, and feel for any grinding or clicking


Last edited by albertj on Thu Jun 21, 2018 4:19 pm; edited 1 time in total
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Abaddon
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Thu Jun 21, 2018 2:40 pm

albertj wrote:
turn the alt pulley with your fingers, and feel for any grinding of clicking

I 2nd this.

Alternators do make some bit of noise. You can put a stethoscope on a brand new alternator with the car running, and it will be the loudest damn thing on the engine.
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Thu Jun 21, 2018 4:18 pm

Abaddon wrote:
albertj wrote:
turn the alt pulley with your fingers, and feel for any grinding of clicking

I 2nd this.

Alternators do make some bit of noise. You can put a stethoscope on a brand new alternator with the car running, and it will be the loudest damn thing on the engine.


Right.

Alternators whirr. Largely the commutator brushes on the rotor, and the fan on the front.

It was kind of a mind bonk for me, and I learned it on this web site, that the best thing to do checking pullies was to turn them with your fingers and feel for scraping, grinding, clicking. Idler pullies, the alternator pulley too.
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albertj
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Thu Jun 21, 2018 4:27 pm

Abaddon wrote:
LARRY70GS wrote:
Gonna attempt this soon.  I know you need to move the alternator out of the way to get to some of the bolts.  Do I need to disconnect the battery?

If you're moving the alternator, I'd disco the battery. Actually, just disco that B+ junction in the RF engine bay. Wrap a rag around it or something so it doesn't arc out on stuff.

You can install the cables at the B+ terminal so that the load cable(s) at the B+ junction is/are on top. Then when you need to disconnect the battery, just Disco *the load side* cables then snug the nut down on the ferrule for the remaining cable from the batt and and snap the B+ cover back in place. Wha-la, *no load* and so no worries about arcing. The hot cable is under the plastic guard. Tuck the dangling load cables somewhere obvious like under the engine mount, unless that is what you are working on, or by the radiator somewhere, or near the frame rail ground post that's near there.
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LARRY70GS
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Thu Jun 21, 2018 4:44 pm

I found it so much easier to go under the seat with a 5/16" gear ratcheting wrench and disconnect the ground cable off the battery.


Now that my coupler isn't making noise, I definitely hear that alternator whirring.  It's the ONLY thing I hear. lmao

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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Jack the R
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PostSubject: Re: Write-Up: Supercharger Coupler Replacement (Series II)   Thu Jun 21, 2018 4:45 pm

albertj wrote:
turn the alt pulley with your fingers, and feel for any grinding or clicking

I can't feel anything wrong with it, and yet it somehow doesn't feel as good as the bad one I replaced, which also feels fine if I just turn it with my fingers. Neither feels anything like the bad snout bearings did, but they turn more freely than the good snout bearings do.
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Write-Up: Supercharger Coupler Replacement (Series II)
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