[Z06] Noise...???
Thread Starter
Instructor
Joined: Jan 2005
Posts: 152
Likes: 0
From: Pompano Beach Florida
Noise...???
Hey, maybe you guys know something about this...When I shift after winding out a gear my car makes a sort of screech noise, sounds like a mix of belt slippage and a blow of valve. I'm not quite sure where it's coming from or what it is...any thoughts?
And no I don't have a blow off valve..
And no I don't have a blow off valve..
Race Director
Joined: Aug 2000
Posts: 10,649
Likes: 31
From: Central Florida
Are you sure you're not hearing the wheels spinning on the shift?
A Z06 will spin the rears on a strong shift to 4th at 100 and 5th at 140+.
If it isn't tire spin, then a mechanical screech on a high rpm shift is not normal. Suggest you try to isolate the source.
If it's a a belt or pulley, as you offered, then you may get the noise by raising the the rpm of the engine (at normal op temp) to say 5500-6000 and then backing off the throttle. If you do that with the hood up and the driver's door open, you should be able to quickly tell it the noise is from the engine bay.
I've never heard a clutch or drive train make such a noise. Anyone else?
Ranger
A Z06 will spin the rears on a strong shift to 4th at 100 and 5th at 140+.
If it isn't tire spin, then a mechanical screech on a high rpm shift is not normal. Suggest you try to isolate the source.
If it's a a belt or pulley, as you offered, then you may get the noise by raising the the rpm of the engine (at normal op temp) to say 5500-6000 and then backing off the throttle. If you do that with the hood up and the driver's door open, you should be able to quickly tell it the noise is from the engine bay.
I've never heard a clutch or drive train make such a noise. Anyone else?
Ranger
Burning Brakes
Joined: Jan 2003
Posts: 844
Likes: 12
From: The Villages, FL
Originally Posted by keen02
Hey, maybe you guys know something about this...When I shift after winding out a gear my car makes a sort of screech noise, sounds like a mix of belt slippage and a blow of valve. I'm not quite sure where it's coming from or what it is...any thoughts?
And no I don't have a blow off valve..
And no I don't have a blow off valve..
Did you ever figure out what was wrong?
Burning Brakes
Joined: Jun 2004
Posts: 1,083
Likes: 0
From: I'm not quite middle aged and I only own one gold chain! San Jose CA
It sounds like high rpm belt slippage to me. This can occur as belts start to age and slip under high demand conditions such as at the higher rpms you are turning at the top of each gear. This sounds like the logical first thing to eliminate as a possible source. It could also be the bearings on one of your pulleys. I would check the belts and accessory drives.
Good luck!
Good luck!
Burning Brakes
Joined: Jan 2003
Posts: 844
Likes: 12
From: The Villages, FL
Originally Posted by Scott04Z
It sounds like high rpm belt slippage to me. This can occur as belts start to age and slip under high demand conditions such as at the higher rpms you are turning at the top of each gear. This sounds like the logical first thing to eliminate as a possible source. It could also be the bearings on one of your pulleys. I would check the belts and accessory drives.
Good luck!
Good luck!
