Quote:
Rod bearing issues are very common with stock block engines. Most of the failures I've seen were caused because people didn't take the time to open up the passages from the main gallery to the mains. The factory did a poor job on those passages. What works for years in a street engine doesn't last very long in a drag motor.
#4 main usually causes the most problems because it also sends oil to the top end. So those rod bearings get smoked first if oil volume or pressure isn't up to par.
More simply put on the #4 main problem. 
Last edited by Sport440; 09/07/11 01:37 AM.
