Intake and exhaust clearance 0.010" hot 0.008" cold. 6-cyl, 1,5,3,6,2,4 firing order Position #1 @ TDC Adj Intake #1,2,4 Exh #1,3,5 Rotate 360 deg to #6 @ TDC Adj Intake #3,5,6 Exh #2,4,6