YounanDiesel

Im planning to adjust my valves on my 2006 5.9 but how do it get it TDC? Where to I look to align it in that position? Whats the best way to achieve TDC?

Thanks in advance!

BigIron70

There is a line on harmonic balancer edge with the letters TDC next to it. This line needs to be at twelve O'clock position to adjust valves. Mark line with some white paint to make it easy to find. You will need a barring tool or a fan wrench will work also, but you will only be able to turn engine backwards with the fan wrench. Just make sure you do not leave it on fan when you start the engine. and remove barring tool if used before starting engine also.

Here is procedure to save time

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 not 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 (Refer to 09 - Engine/Cylinder Head/COVER(S) , Cylinder Head - Removal).
3. Using the Crankshaft Barring Tool 7471B or equivalent, rotate crankshaft to align damper TDC mark to 12 o'clock position.a. If both number one cylinder rocker arms are loose, continue to next step.
b. If both number one cylinder rocker arms are not loose, rotate crankshaft 360 degrees.

4. With the crankshaft at this position, valve lash can be measured at the following rocker arms:
INTAKE 1-2-4
EXHAUST 1-3-5


NOTE: If measured valve lash falls within specifications, no adjustment/reset is necessary. Engine operation within specification has no adverse affect on performance, emissions, fuel economy or level of engine noise.
5. Measure the valve lash by inserting a feeler gauge between the rocker arm socket and crosshead. See the following Valve Lash Limit chart for limit 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.
6. If adjustment/resetting is required, loosen the lock nut on the rocker arms and turn the adjusting screw until the desired lash is obtained:
INTAKE 0.254 mm (0.010 in.)
EXHAUST 0.660 mm (0.026 in.)
Tighten the lock nut to 24 N·m (18 ft. lbs.) and recheck the valve lash.




7. Using the Crankshaft Barring Tool 7471B or equivalent, rotate crankshaft 360 degrees (one revolution) and align damper TDC mark to 12 o'clock position.
8. With the crankshaft at this position, valve lash can be measured at the following rocker arms:
INTAKE 3-5-6
EXHAUST 2-4-6

9. Measure and adjust or reset the valve lash by using the same method as above. See the following Valve Lash Limit chart for limit specifications.
10. Install the cylinder head cover (Refer to 09 - Engine/Cylinder Head/COVER(S) , Cylinder Head - Installation).
11. Connect the negative battery cables.

YounanDiesel

Sweet! Thanks for the help, you rock! Cheers.

carl48

i have been talking to cummins, they built the engine to be set on 0.020 on the exhaust, chrysler uses 0.026 for part of there in-cylinder egr thing. set them at 0.020

SnipeoffYT

Hey guys we just did this adjustment on an 04' Dodge 2500, Check out these YouTube videos I made showing the process.
Part 1 is disassembly, Part 2 is how to perform the adjustment itself, and Part 3 is reassembly. Hope these help
(Part 1)