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Old 08-11-2010, 02:39 PM   #1 (permalink)
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Valve Adjustment

Any one know how often to adjust the valves? 06 2500
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Old 08-11-2010, 04:17 PM   #2 (permalink)
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There is a write up on it, if you do a search youll find it. Personally I took mine to a local diesel shop and paid them $300. I dropped it off before work and picked it up after work and I didnt have to get dirty and wonder if I did it corectly.
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Old 08-11-2010, 04:29 PM   #3 (permalink)
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They're supposed to be checked/adjusted at 150k miles but I would do it sooner than that.
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Old 08-11-2010, 05:43 PM   #4 (permalink)
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A buddy of mine is a diesel mechanic, he says 120K.
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Old 08-11-2010, 09:15 PM   #5 (permalink)
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Around 120k is factory recommended. However, most times they won't be out of adjustment.
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Old 08-11-2010, 09:18 PM   #6 (permalink)
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I have seen them out of adjustment at 50k miles... Just did mine again at 95k and again at 125k

premature, yes, were they out of wack a tad, yes

there is a good write up on it here
Valve Adjustment 24 Valve CTD's
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Old 08-12-2010, 05:39 AM   #7 (permalink)
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My apologies, I was incorrect about 150k. I just checked the service manual for an 06 and it says initial valve adjustment at 135K. The given procedure is below.

Keep in mind that the exhaust valve lash settings changed in 06 to the below numbers.



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 (Refer to 9 - ENGINE/
CYLINDER HEAD/CYLINDER HEAD COVER(S) -
REMOVAL).
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.
DR ENGINE - 5.9L DIESEL - SERVICE INFORMATION 9 - 2643
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
INTAKE
0.152 mm ( 0.006 in.) MIN.
0.381 mm ( 0.015 in.) MAX
EXHAUST
0.533 mm (0.021 in.) MIN.
0.863 mm (0.034 in.) MAX.
NOTE:
If measured valve lash falls within these specifications, no adjustment/reset is necessary. Engine operation within
these ranges has no adverse affect on performance, emissions, fuel economy or level of engine noise.
5. If adjustment/resetting is required, loosen the lock
nut on 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 Nm (18 ft. lbs.) and recheck the valve
lash.
6. Using the crankshaft barring tool, rotate the crankshaft
one revolution (360) to align the damper
TDC mark to the 12 o’clock position.
7. With the engine in this position, valve lash can be
measured at the remaining rocker arms: INTAKE
3–5–6 / EXHAUST 2–4–6. Use the same method
as above for determining whether adjustment is
necessary, and adjust those that are found to be
outside of the limits.
8. Install the cylinder head cover (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - INSTALLATION).
9. Connect the battery negative cables.
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Old 09-05-2010, 02:13 PM   #8 (permalink)
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The service manual for an 03 says no maintenance valve adjustment necessary.



Where are you guys reading 150K foe valve adjustment?

The 24–valve overhead system is a “low-maintenance”
design. Routine adjustments are no longer necessary,
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Old 09-05-2010, 03:06 PM   #9 (permalink)
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source automotive is right next door to my shop. i had them adjust the valves on my 06 at 130. they said that the specs dodge provides have a very wide range. and that they have seen noticeable differences when adjusting within those parameters. They only charge 180 for an adjustment on my truck. I noticed a smoother idle and maybe a bit smoother accelerations.

you know the manual also says you only need to change your oil every 7500 miles, do you follow that service schedule? having them checked and adjusted can NEVER be a bad thing.
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Old 09-05-2010, 03:50 PM   #10 (permalink)
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Old 04-03-2011, 11:58 PM   #11 (permalink)
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Just did mine, they were are loose as hell(040). I was amazed. seems like

i picked up 25hp+ nice an quiet now. feel sorry for Harley dud when I stomped her down she let go a cloud ! yeah buddy 05 qclb 107000miles
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Old 04-04-2011, 12:15 PM   #12 (permalink)
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The local Cummins shop I went to recommends the first valve adjustment at 50k miles and then again after another 200k miles. They told me that the first adjustment is most important and is what they recommend in all their literature for commercial engine sales. They said that Dodge doesn't recommend the proper intervals.
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