New cooling system, still overheating.

belts are not routed correctly for one . Are you sure you have the correct rotation fan and pump combo. They make two different directions for serpatine belt cars. Just a thought. My friend had the wrong fan . it would only heat up when the hood was closed when you were moving. Sat there with the hood open for an hour ran cool. Noticed it when I told him to tap the key to check the fan clutch. Ya never know.