[Dega Man]

I had my supercharger and snout ported, also I had a new pulley installed now that everything is back together I am hearing a rattling noise that sounds like a noisy valve train, but when I remove the supercharger belt it goes away. Would this be normal now due to so much metal being removed from the supercharger or could it be a bearing got damaged while replacing the pulley? Everything was quiet prior to this work. Have any of you noticed this after porting the snout and charger?

 

[Karch]

You will hear more noise, but mine doesn’t sound like it’s rattling.


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[Dega Man]

You will hear more noise, but mine doesn’t sound like it’s rattling.


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I cannot hear it with the hood close, but with the hood open I can hear some light noise similar to a valve train noise similar to solid lifters but not as loud.

 

[db-guru]

I had a noise after some work that turned out to be a bad fitting (worn?) solid isolator. Not directly related, but worth checking the fit.

 

[Dega Man]

I had a noise after some work that turned out to be a bad fitting (worn?) solid isolator. Not directly related, but worth checking the fit.

With the belt off there is no free play or slack in the supercharger pulley when turning back and forth. The snout and charger was ported pretty aggressive, the snout was ported out to match a 102mm tb so the noise or harmonics might be normal or the bearing might have gotten damaged during the pulley change, I really do not know how a bad bearing would sound. there is only 1100+ miles on this car.

 

[RocketSled]

Depends on how the bearing is damaged (and the type of bearing). Ball races can get dented or "Brunel" (where the balls actually pull metal out of the race) and in both cases, the bearing will rattle randomly when spun.