Had to replace both heads on my 2000 3.0L due to cracks and now have a lot of lifter noise motor runs fine. I pulled the lifters apart and cleaned them and believe I have some weak springs in the roller lifters. Have not been able to find replacement springs for the inside of the lifters. Rollers are fine and no visiable wear on the cam lobs. Anyone have information if the springs are avaiable and where or if the lifters are repairable or have to be replaced? Appreciate any information available. Thanks