My truck starts great but, immediately after its running, there is a funny sound coming from the front. The sound starts off persistent then it dies down as the truck warms. It only makes this sound when I start the truck for the first time of the day or its been sitting and I start it after work. If Im getting in and out throughout the day its fine. My buddy thinks that it may be the radiator. Hmmmmm

 

What kind of weather climates? Are you driving the truck in cooler temperatures right away after starting? Explain more about what noise you are hearing...

 

Sounds like the normal sound of the clutch fan as it is engaged and tapers off. It's normal

 

It doesn't sound like a belt. It's a rythmic, fast at first and then it slows down after a few and eventually goes away. A belt would have the same rythim the whole time. Its hard to describe on here. I live in Bend Oregon so, we are at a higher elevation.

 

Maybe the lifters?
Put a stethoscope to pinpoint the area.