Didn't see this posted but GM issued an new PI on the 11'th regarding the new SC's used in the 14's and in replacements. Guess there was some logic to the spring loaded iso. So if anyone is getting this noise it "normal" again.
So the solid isolator in the new SC has not fixed the rattle issue!? Are you saying you put a solid isolator in your brand new supercharger that already had one in it?
Factory isolator was spring loaded to prevent one noise, but created another they thought wasn't as bad. When people (or GM) have it replaced with a solid isolator, the noise GM was trying to avoid appears. There was a GM engineer on one of the forums discussing this a while ago.
Every Lingenfelter solid isolator I have installed, has remained silent. I attempted to install one Metco that was too tight. I clearance the holes a little and installed. It rattled like hell because I clearanced the holes just a cunt hair too much. I pulled it back out, installed a Ling Iso, and it's been silent ever since. And every car I've installed these on are driven hard on the street and the track. Even the new GM solid isolators make a "noise".
Yup, just had mine replaced about two weeks ago as well... Over the past couple days the car has had what sounds like a faint exhaust rattle right at 900rpms (trans in D and foot on the brake), only with the trans in D this will happen, in P you don't hear it at all,...
Just to try and clarify, a solid isolator from say LF will take this "new" rattle noise away?
Hmmm, I wonder if this bolt should be almost falling out..smh
Also.. Seems like the noise is coming from the belt tensioner.. Had someone sit in the car and hold the rpm for me while I listened, the noise is VERY audible when up close...did the old screwdriver trick and put my eat to it..
So I just had my SC replaced ('11 M6 sedan) and I'm getting the rattle in the 700-900 rpm range. If I were to change the isolator in the new SC with the LPE isolator will it fix the noise? The original SC sounded a lot better (although I know the rattle at idle could've lead to failure on that one)...it's annoying for sure
harmonics. if you have stock pulley on it switch to an overdrive. you'll shift that gear noise below normal operating range and it'll be "silent" from here on out
My SC wasnt making any noise and GM wouldnt replace it. Should I just install a solid LPE iso in my current blower, or wait until it goes bad and get a new one?
Well if your supercharge isn't making any nose, why do you need to replace it?
If it isn't making any noise, and you replace it with the solid isolator, you just voided the extended 140,000 mile warranty on the supercharger. If it makes noise, then you buy yourself a new supercharger.
Well, as predicted, my warranty replaced SC now has the "groan" between 800-1000 rpms.. It's REALLY loud. To the fact that yesterday morning some dude sitting outside of Starbucks turned his lip up to the sound as I was in the drive-thru line. ugh.
This is your problem, not your car. Who cares what snooty coffee bitch thinks? Get your java and roll on!! Besides...next time you'll have the cutouts open...wonder what face he will make THEN???
I'm typically a dunkin' donuts coffee kinda guy, but I had a gift card from a coworker to Starbucks. I'm almost certain there is crack cocaine in the dunkin' coffee
It's a solid iso, but some of us are experiencing a "flutter" or grinding noise between 850-1000rpmps on autos and manuals. GM says it's normal. A lot of people are getting their new SC's and putting in LPE solid isolators which is curing the "flutter" noise.
Ok so the Gm iso is still not the same as LPE's which I though I read in this thread. I have a appointment next week for my SC which I hear some knocking noise right in the area of the iso and if its replaced I want to swap out to a solid.
Just to add to this ASteggall stated now that the new SC getting replaced this year have now the spring unit again I guess in 2017n they changed back......just heads up...
The spring isolator was reintroduced in 2015, the solid was only used for a short time in 2014.
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