No probably not, it's most likely just the fan. If it gets to bothersome take it in to get looked at.
It CAN be CV joints, but it depends on the sound.
When you drive over a clicking bettle.
Check your brakes(pads and rotors)
Check your oil level-could be the valvetrain.
I actually had this problem with my first xbox. It turned out to be the hard drive.
the clicking sound is the blinker. when you signal to turn with your blinker the light flashes and makes a clicking sound.
depends on model
Yes it is. Some of the good features would be: -MacBook Pros have newer and more powerful graphics cards than the regular MacBook. Which means, you can play games, watch movies and other things in better quality than if you watched them on a regular MacBook. -Macbook Pros are driven by a more powerful processor. -Macbook Pros have higher range sound cards. Which means, the quality of music listening is better than the regular MacBook. -You can have more RAM and hard drive memory on a MacBook Pro.
Clicking means metal on metal and no oil in between. Check your oil, oil and filter changed? Don't drive it if it gets worse - there is a glog somewhere - or it is too late already.
Your hard drive. If this is happening your hard drive is already dead. Back up your most important data NOW and get a new hard drive.
You should check the cv joints on your drive line. When they start to go bad they'll start clicking when you turn.
The "Clicking" sound that a hard drive makes is NEVER a good sound. What you are hearing is the drive re-zeroing (the heads are returning to the home position) because it is having read errors.The fact that you're getting a "primary hard disk error" indicates that the drive is most likely beyond help.Sorry to tell you this, but it's time for a new hard drive.See the question: "Why is it important to make backups?" ;)