The squeel coming from my mighty cummins is driving me crazy!! No mechanics, dealer or ortherwise, can tell me what it is. It does it consistently after she is warmed up, and is very loud at idle. Seems to get faster/quiter with increased rpm and then gets drowned out at higher rpms. And its not serp belt or related pully, seems to be coming from the block near manifold/rail on drivers side. Thought maybe pilot bearing but it doesn't change if in nuetral or in gear with clutch engaged or not.

So at idle, could you hear main/crank/rod bearings going bad, or any other internal bushings??

Also been noticing a slight squeel when under load on decel that goes away when clutch is disengaged, could they all be related, maybe camshaft bushings???

This is going to be fun to get the dealer to warranty under the 100k....guess i will start by analyzing oil for signs of bearings going south...

Thanks for any ideas!