So i pulley down my 5.3 this weekend to install my cam and found the cam bearings are bronzed a bit. the engine has 150,000 miles on it. They dont looked burned nor does the cam look damaged anyone else ever ran across this thanks for the input

 

if the copper is starting to show on the bearings, i would change them

 

I've seen this a lot on the number 1 bearing on LS engines, many pics on tech, and both my 5.3 and LQ9 look that way. I'll be changing the cam bearings in the LQ9 since it's getting torn down and refreshed anyway, but I just let it roll when I swapped the cam in the 5.3, and it's been that way for over 25k now.