How do you adjust rocker arms on 04 dodge diesel?

Answer 1

You need a .010 (intake) and a .020 (exhaust) feeler gauge first off. I can't remember the torque specs so look them up. With the valve cover off the first rocker will be intake followed by exhaust, repeat times 6. Bar the engine over in normal (clockwise) direction as viewed from the front of the engine until #6 valves are in overlap (bar the engine over a couple of times and watch the valves open and close, there will be a point when the exhaust valve starts to close and the intake starts to open, both rockers will have tension on them, this is overlap). With #6 in overlap you can start at #1, both the intake and the exhaust valves will be "loose" meaning you can move them up and down a little bit. The firing order is 1-5-3-6-2-4. 1 and 6, 2 and 5, 3 and 4 are companion cylinders meaning that they go up and down at the same time but are 180 degrees out. Set this up as

1-5-3

6-2-4

This works with any four stroke firing order to find the companion cylinders. This is needed to know which stroke the other cylinders are on to adjust them. If 6 is on overlap (just finished exhaust stroke, going to intake) 1 will be on power and both valves closed completely.

Caution!!! Do not run the overhead with the engine hot. The valves will shrink when they cool causing your adjustment to be completely off. Make certain you use the .010 on intake and .020 on exhaust, do not mix them up! Do not bar the engine over counterclockwise. This will remove and reverse the gear lash and your adjustment will be off, better to bar the engine over another full rotation than to bar it backward.

If you have never used feeler gauges or are not mechanically inclined I really recommend taking your truck to a pro.

So, with #1 in power (#6 in overlap) you can adjust #1 intake and exhaust, #2 intake, #3 exhaust, #4 intake, and #5 exhaust.

Bar the engine over so that #1 is in overlap (#6 in power) and you can adjust #2 exhaust, #3 intake, #4 exhaust, #5 intake, and #6 intake and exhaust.

Sorry if this is too much info but I have had to rebuild too many of these things due to people's lack of knowledge and I would hate for anyone to mess up their engine.