LT5 INTERNAL NOISE

[fred dosa]

90,000 MILES ON MOTOR, NO DTC CODES
I TOOK SPARK WIRES OUT ONE AT A TIME WHILE RUNNING AND NOTICED
CHANGE ,ALL CILINDERS SEEM TO BE FIREING
HOW DO I TEST FOR ROD BEARING FALURE IT SOUNDS LIKE ITS COMMING
FROM BOTTOM END. NOISE GETS LOWDER WHEN I REV MOTOR AT IDLE