Hey guys, I have a 1984 z28 and every time i start the car up the steering does not make any noise but when i drive it for like 5 minutes the steering makes like a whineing noise or like a grinding noise when i turn the wheel. I have already change the power steering pump and the power steering box ( they are both brand new) i don't understand what is going on and i need your help please!

Thank you

 

I hate to risk insuting by asking about the obrious, but is the belt tight?

 

Belt is tight

 

Leak on the low pressure side.

Replace the lines.