I took my truck on a trip up north for about a 230mile trip. It ran fine on the way up but on the way back yesterday, I got stuck in traffic. Heard a ticking as I accelerated. So I stopped to listen to it, and the turbo was sputting at idle, seemed more like a rubbing sound. I just fired her up this morning seems to fine. Any ideas? I hope I just didn't trash out a turbo The truck is a 1998 Chevy 3500 with a 6.5L diesel, the turbo is a gm-8 if that helps.