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2011 CTS-V BDE (Sold) 2010 CTS-V Red (Traded)
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Discussion Starter #1
And GM isn't going to do anything about it for us! But they will for the ZL1!



Original:
 

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09 CTS-V
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GM and or Cadillac Customer Service please chime in and explain the reasoning behind not doing such for the 2009+ CTS-V?????????????????
 

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2011 CTS-V BDE (Sold) 2010 CTS-V Red (Traded)
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Discussion Starter #5
So it looks like finally GM is going with solid bushing that W4M has been reccomending for years.
Pretty much, yeah. They knew about this otherwise, why would they use a solid isolator? 2011 models and up should have been using the ZL1 supercharger. Instead, we get the shaft.

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Not even for the 2013 V huh??
Apparently so, but hopefully not, see above response.

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GM and or Cadillac Customer Service please chime in and explain the reasoning behind not doing such for the 2009+ CTS-V?????????????????
I'm willing to bet they already have hundreds upon hundreds of the V superchargers so it's easy for them to just give us the shaft and give the ZL1 guys the new and improved.
 

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2009 CTS-V
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Now I'm not trying to be critical but there are a crapload of us dealing with this. I second the post about asking the GM reps who pop in here from time to time with gracious responses about issues we have to understand that we are voicing to GM that this needs to be a retrofit into our cars. Or.....warranty the blower for life. I'll take either one.
 

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<-----"Hulk" 2000-2012...He will always be missed :-(
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I still don't know why such a big deal is made about the isolator. Yes, if its rattling to loud, it's embarrassing. But it also seems like the rattle lessens as miles pile up. Also, how can it damage the blower? It's a contained are, correct?

Enlighten me please.
 

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09 DW CTS-V Sedan
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243 Posts
I still don't know why such a big deal is made about the isolator. Yes, if its rattling to loud, it's embarrassing. But it also seems like the rattle lessens as miles pile up. Also, how can it damage the blower? It's a contained are, correct?

Enlighten me please.
Well, you're incorrect in that the rattle lessens up as miles pile up. That's not accurate. it gets worse. In my case at least, it got worse up until the supercharger was replaced at 33k miles. it can't damage the blower, and it is in a contained "are".
 

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2011 CTS-V BDE (Sold) 2010 CTS-V Red (Traded)
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Discussion Starter #10
Well, you're incorrect in that the rattle lessens up as miles pile up. That's not accurate. it gets worse. In my case at least, it got worse up until the supercharger was replaced at 33k miles. it can't damage the blower, and it is in a contained "are".
+1! It only gets worse. Mine is getting even louder and my supercharger is pretty new. It's actually rattling above 1200 rpm, so much for GM following their own TSB. Around 2000rpm-2200rpm, the rattle is very quick and loud. Then once you pass 2500 rpm, the supercharger whine/exhaust/engine drown it out.
 

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2009 CTS-V , 2010 SRX 2.8T
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Yep. Eventually the stock isolator will get worse and worse until it takes out your blower. It's cheaper for GM to fix the few blowers that go out before 100k than to do a recall on every single one that makes noise. Im glad I didnt listen to the GM b.s. about it be "normal" and had it replaced with a solid isolator when I did.
 

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Pretty new to the CTS-V sceen so sorry for any noob questions. Does GM replace the existing isolater if you have the supercharger rattle? Also, if going with a solid isolater fixes the issue, how much does parts and labor run? Obviously GM would not do this, but how much would a local LSx shop charge for somthing like this?
 

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2013 6MT V wagon, OBM, 2009 silver V sedan (traded)
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Pretty new to the CTS-V sceen so sorry for any noob questions. Does GM replace the existing isolater if you have the supercharger rattle? Also, if going with a solid isolater fixes the issue, how much does parts and labor run? Obviously GM would not do this, but how much would a local LSx shop charge for somthing like this?
The supercharger comes from Eaton. GM therefore feels the supercharger is a non-serviceable part. Further, they feel that the sound is normal. Therefore, they are only occasionally replacing superchargers.

The replacement solid isolator is an inexpensive part. Installing it voids the drivetrain warranty even though it solves the problem, so install at your own risk. Others can comment on the install cost but I don't recall it being very high.

w4m was right all along. :thumbsup:
 

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2009 CTS-V Black/Black, manual
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Well, you're incorrect in that the rattle lessens up as miles pile up. That's not accurate. it gets worse. In my case at least, it got worse up until the supercharger was replaced at 33k miles. it can't damage the blower, and it is in a contained "are".
He's not incorrect because in my case, the rattle noise has decreased significantly at 20K miles. Obviously, not the case for all, but in my case yes.

Rob
 

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Red 09 CTS-V, Silver 06 STS-V, Red 08 CTS4 for winter
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A fix, or was this a Cadillac specific item? Anyone know if the ZR1 has the same rattle? Also, it is interesting that the ZL1 was put on quality hold that could delay shipments for weeks.

I have installed the solid coupler and it definitely eliminates the rattle nicely.
 

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Red 09 CTS-V, Silver 06 STS-V, Red 08 CTS4 for winter
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Here is a pick of the supercharger snout shaft wear thanks to the spring along with a pic of the stock couplers beside the solid one. These are the original snouts with stock pulley from my car and my friend's. His had pretty harsh wear, even at 5000 miles and mine was even worse at 25,000 miles (when I swapped). I would hate to see what 50K or 100K would be like with the spring coupler in place.





 

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<-----"Hulk" 2000-2012...He will always be missed :-(
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Here is a pick of the supercharger snout shaft wear thanks to the spring along with a pic of the stock couplers beside the solid one. These are the original snouts with stock pulley from my car and my friend's. His had pretty harsh wear, even at 5000 miles and mine was even worse at 25,000 miles (when I swapped). I would hate to see what 50K or 100K would be like with the spring coupler in place.







Say it wore down to pencil thickness. How would that affect the operation of the engine/supercharger?
 

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Red 09 CTS-V, Silver 06 STS-V, Red 08 CTS4 for winter
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I would not want all of that metal wearing into the bearings, that is for certain. The internal shaft is also what limits the spring movement in the coupler. As the shaft wears, it moves a lot more, which is the sound people complain about. Now, considering the very cheap plastic used, if the spring did not absorb the hit well from the supercharger spin, I could see the coupler disintegrating after time. Compared to the solid coupler, the stock one feels like a McDonalds toy.
 
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