I have an 88 mazda rx-7 annivarsary edition. I have noticed that lately my turbo doesn't have that whistling sing to it anymore. Instead of a whistle, it sounds more like a rattling, like my turbo is loose and it is not spinning smoothly, or something like that. It still kicks the boost up high like it used to, but I am worried that it is breaking. Have any of you had this problem? Is my turbo about to blow? I have also noticed that my exaust is making a weezing sound somewhere around the turbo. I thought maybe the exaust was just coming loose, but could it be something else with the turbo?? Thanks to all of you for the help!

 

I am having the EXACT same problem...It doesnt do it so much in 1st or 2nd but if your cruising in 3rd or 4th and hold the throttle down it makes that ratteling noise now instead of the sssssssswwwwwwwwwwwweeeeeeeeeeee psssshhhhhhhhhhh noise!!! Anyway an answer would be greatly appreciated so BUMP...

 

blackturbo2, does your exhaust sound like it is leaking too? aside from the rattling?