chevroletman

iTrader: (3)

I have a 2002 6.0 gmc truck that was wrecked and rolled over .well ,I started it but didn,t pull the plugs out first. it sounded good for a second then started making a knocking like maybe i bent a rod? i took the pan off and looked no bent rod ,no shavings in oil ,good compression , runs good .I had a mechanic listen to it and he thought it may be a rod bearing but wasn,t sure , could it have messed up the timing chain or bent a rocker arm? I checked all the pushrods I really don,t want to pull the motor if i don,t have to . should i just drive it till it blows?