my Honda type Sh 1998 prelude is making a little rattling noise when I turn it on and it goes away when I slightly step in the clutch and it can't be my clutch because I replaced it less then 3 days ago can some one help me please !!

 

Could be your clutch for sure. Did you torque everything to the correct spec, and in the right order? Also did you replace the throw-out bearing?

 

Other than the head gasket bolts the clutch bolts are the most critical to torque correctly, assuming its not the throwout bearing.

 

Can you pinpoint the noise location?