2azfe, can harmonic balance bearings cause knock?
Got a highlander 05 AWD with the 2az....came to me knocking.
Cuts off within a few seconds, and it felt like the engine was about to jump out of the engine bay.
Tore apart the lower oil pan, not much magic sparkles in the oil.
The bearing is heavily scored for the balancer, but balancer shafts seems good.
Could this be the cause of knock?
The head came off and pistons felt stable, figured I'd do a head gasket since the cylinder walls are fairly immaculate but he has a slight coolant leak so I fixed it...