Real Street 2JZ Failure Analysis Tear Down - Dyno Mule V1

This is what it looks like when the increased cylinder pressure of knock detonation kills a bearing. Bearings are a sacrificial wear item, designed to fail before the crankshaft, block, or connecting rods. Normally, they wear in a rotational motion over time, however when the engine encounters knock detonation, the cylinder pressure can more than double or triple, pinching the bearing between the stronger parts. This can cause you to smash or "spin" a bearing. Knock Detonation can be so severe that it breaks an engine in one pull, or it can be so mild that it takes hundreds of runs to kill a component. But pressure is pressure. This particular engine was run for over 1000 pulls, most of which were at or over 1000whp. It lived a healthy live for years before we started testing fuels in 2019. To see the gains of certain fuels over others, we had to let the engine knock on the poorer quality fuels. What you see in this video is the result of that testing.