Cummins 4BT – Four Cylinder Engine Adjustment

14 mm, Flat Blade Screwdriver
Locate Top Dead Center (TDC) for Cylinder Number 1.
Check/adjust the valves as indicated in the illustration (I = Intake, E = Exhaust).
Tighten the locknut and measure the valve lash again.
Torque Value: 24 N»m [18 ft-lb]

Mark the vibration damper and rotate the crankshaft 360 degrees.
Caution: To prevent engine or pin damage, be sure tim­ing is disengaged.

14 mm, Flat Blade Screwdriver
Adjust the valves as indicated in the illustration.
Tighten the locknut and measure the valve lash again.
Torque Value: 24 N«m [18 ft-lb]