Quote:
Originally Posted by Bigtime53
I did. I called him back yesterday and he read the bulletin back to me and it said they put a solid isolator on it instead of the spring isolator. I will make sure that he understands that when I take my car back to them when the parts come in.
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IIRC, the original isolator was spring loaded with no grease, then they changed to a solid isolator,. Some time later they changed to a spring loaded isolator that was packed with grease to dampen the sound.
According to Eaton who was the OEM, the isolator was intentionally designed to be spring loaded around a shaft that was slightly softer by design, which resulted in groves being worn in the shaft. It was spring loaded on purpose to absorb some of the inherent 'rattling' of the gears that drive the supercharger lobes.
Unfortunately as this 'rattling' became somewhat audible and people disassemble the isolator and found the grooves worn in the shaft, they figured the worn grooves were a sign of impending failure and complained to Eaton.
Eaton responded quickly to change to a solid shaft isolator to please the people that complained about the 'rattling'.
Eaton then decided that it was in there opinion to go back to a spring loaded shaft to deal with the original issue of the gears/lobes in the supercharger, but to help alleviate the rattling, they packed the isolator with grease.
Note, this is just what I remember, the original issues being 9 years ago.
It may or may not be entirely accurate.