RAM 3500 HD Truck 4WD L6-6.7L DSL Turbo VIN A (2007)
Valve Clearance: Adjustments
VALVE LASH ADJUSTMENT AND VERIFICATION
NOTE: To obtain accurate readings, valve lash measurements AND adjustments should only be performed when the engine coolant
temperature is less than 60°C (140°F).
The 24-valve overhead system is a "low-maintenance" design. Routine adjustments are no longer necessary, however, measurement should still take
place when troubleshooting performance problems, or upon completion of a repair that includes removal and installation of the valve train components
or injectors.
1. Disconnect battery negative cables.
2. Remove cylinder head cover.
3. Using the crankshaft barring tool #7471-B, rotate crankshaft to align damper TDC mark to 12:00 o'clock position.
a. If both number one cylinder rocker levers are loose, continue to next step.
b. If both number one cylinder rocker levers are not loose, rotate crankshaft 360 degrees.
4. With the engine in this position, valve lash can be measured at the following rocker arms: INTAKE 1-2-4 / EXHAUST 1-3-5. Measure the valve
lash by inserting a feeler gauge between the rocker arm socket and crosshead. Refer to VALVE LASH LIMIT CHART for the correct
specifications. If the measurement falls within the limits, adjustment/resetting is not necessary. If measurement finds the lash outside of the limits,
adjustment/resetting is required.
Valve Lash Limit Chart
