Dodge Ram 2500 broken rocker arm bolt.
I am having the same problems on my '99 Dodge Ram 2500 V10 with 206,000 miles. My engine started missing and got a error code P0305 whis is cylinder #5. after removing the left valve cover I found the intake rocker arm bolt broken. The pushrod was missing and had to remove the lower intake to get to it, the pushrod was not bent and the oil passage was clear. I got the engine back together and replaced the bolt and torque it to 21 ft. pounds. I started the engine and it ran smooth but had a ticking sound. After about 12 minutes I heard a pop and the engine started missing. I removed the left valve cover and found another broken bolt on #5 but this time it was the exhaust rocker arm bolt. This time I can't get the broken bolt out and I need to drill and use an easy out.
I believe what is happing is the lifter is stuck full out (like a solid lifter) and when the pushrod compress the valve spring it compress it to coil bind and this puts excessive pressure on the bold and it snaps the bolt (the ticking sound). A bad lifter should NOT cause coil bind! The only way to stop this from happening is to 1. Get shorter push rods, 2. Shim each rocker arm. If this is what's happening then there maybe a design flaw? Now what causes the lifter to get stuck? Each lifter has a check valve and a spring. I think that there is debree in the lifter and it can't bleed the oil and causes the lifter to stick. I plan to test this when I tear down the engine and check each lifter. Each lifter can be tested by compressing it, if it won't compress the it is stuck and needs to be dissasimbled or replaced. To clean a lifter place it is deicel fule and engine oil 50% mix get an old pushrod and pump it several times, then place it in clean oil and pump it a few times. All lifters should act the same if not then dissasimble or replace them. Don't get the lifters mixed up do each lifter one at a time. Check the pushrods for clear pasage. What caused the debree..... maybe a failure in the oil filter bypass valve alowing dirty oil getting into the engine? When you dissasimble one see if that what happened.