Is a turbo supposed to make a noise when you shut the car off? when my car did run, i shut it off andi heard what i thought was the turbo spinning down, even though i had not yet experienced the boost at ALL when i drove my car, yet is was realy slow and only did 55 but mabey thats cause i have 80 p.s.i. in each cylinder?(dry test,p90a head) I thought i heard the turbo spinning once. Man why does this @!#$ always happen to me??!? i feel like i could cry. My car is geo with a 280zx body, and a turbo that doesn't work. well im going to tear my engine appart tomorow anyway. any rebuild tips? if i tear down the enigne i will replace all gaskets, head temp sensor, spark plug wires, replane the head, check for bottom end wear(replace accordingly), replace rings, timing chain and ??? Can any of you think of anything else i should replace while im in there? or not replace. Waterpump mabey, hhmmmm let me hear your thoughs on this.