http://www.autozone.com/servlet/UiBroker?UseCase=S001&UserAction=viewSimpleDiagInfo&Parameters=info
answer sounds to me like your Power Steering fluid is old and dirty or wrong viscosity oil thins out when hot hence the noise going away
I would also say it is the belt. to get more wear out of it and to stop the noise, rub the inside of the belt with a bar of soap.
A simple tune-up should correct the issue.
Valves tapping?
what causes a roaring sound in a 2004 pontiac sunfire after it warms up? it runs great and idles great and quiet except for this.Anonymously
Wait until it warms up and melts
why is there squeek noise when starting and then goes away when engine warms up
It will until the coolant warms up.
With those symptoms, you Need to check the fluids level, sound like it is low.
Often a knock when cold is caused by piston slap, which is pistons rocking in the cylinders until they expand in size when the engine warms up.
Could be a tired power steering pump.
replace your mapp sensor
its prob the thermostat i had the same problem with my uncles
this is caused from piston to cyl wall clearance when engine warms up the pistons exspand and the noise is less. DON'T WORRY ABOUT IT