I have searched and read numerous posts on broken rocker arms. Every post lead me to believe that broken rocker arms would be found sitting under the valve cover. I just opened valve cover for my Libby (to install ARP studs) and to my surprise I found a broken and lost rocker arm on intake #4 far back towards the firewall! I looked around the valve for broken rocker but I can't find it. I am going to try and fish valve cover intake ports tomorrow. But in the mean time, has anyone ever had this kind of issue? Would I need to open head to find the broken rocker arm? I hope not. I am already too deep in to engine than I have ever been with any of my cars.

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'06 Liberty CRD Limited. Bought at 91K miles.
ARP studs, New rockers, Stant inline tstat, Weeks 1&2, Provent, IDParts Silicone hoses,
2-1/2" Full OME lift, Timing belt, Water pump, TransGo kit, Plastic fan, Fumoto
2nd gen fuel head with 2nd stage 2 micron filter, in-tank lift pump, G2 Rear Diff Cover

Another relevant information: I was getting code for bad #4 glow plug before I took the valve cover off.

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'06 Liberty CRD Limited. Bought at 91K miles.
ARP studs, New rockers, Stant inline tstat, Weeks 1&2, Provent, IDParts Silicone hoses,
2-1/2" Full OME lift, Timing belt, Water pump, TransGo kit, Plastic fan, Fumoto
2nd gen fuel head with 2nd stage 2 micron filter, in-tank lift pump, G2 Rear Diff Cover

Are all the valve stems at exactly the same height? Where are you located?

It is a possibility that any bits of the rocker are now in the oil pan, some of the passages are small, but that is where they all go. I can try to examine the spare (destroyed) head that I have outside tomorrow to see what (if anything) can be determined about where the parts might go... What is missing and how big might it be?

If you need assistance, I can potentially come and work on it for you, but glow plug issues should not be ignored. I'm in the process of finishing replacement of an entire engine b/c of a broken plug. This is a very serious issue.

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Proud supporting vendor of LOST Jeeps
TRAVELING CRD TECH. I come to you!
Need help? Just ask! I've taken it apart more than most.
Email jeep [at] maincomputer [dot] com - BOARD MESSAGING IS BROKEN
Over 225 CRDs currently driving with my valves, timing belt, rockers, or ARP Studs.
Bad noises = REALLY bad things.

There are several oil drain passages that the rocker could have fallen into but Im pretty sure the rocker is too big to make it all the way down into the pan.
It probably got knocked off when you removed the valve cover.
A magnetic retriever tool will help.

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U.S. Army Retired

You were right. I knocked off a rocker behind the block next to the firewall. Thank you for the tip.

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'06 Liberty CRD Limited. Bought at 91K miles.
ARP studs, New rockers, Stant inline tstat, Weeks 1&2, Provent, IDParts Silicone hoses,
2-1/2" Full OME lift, Timing belt, Water pump, TransGo kit, Plastic fan, Fumoto
2nd gen fuel head with 2nd stage 2 micron filter, in-tank lift pump, G2 Rear Diff Cover

Thanks for the ideas. Glow plug is not broken it is just out electrically. I have all glow plugs out safely and being replaced with 7V metal plugs. And as I said in earlier post, I found the knocked off rocker behind the block.

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'06 Liberty CRD Limited. Bought at 91K miles.
ARP studs, New rockers, Stant inline tstat, Weeks 1&2, Provent, IDParts Silicone hoses,
2-1/2" Full OME lift, Timing belt, Water pump, TransGo kit, Plastic fan, Fumoto
2nd gen fuel head with 2nd stage 2 micron filter, in-tank lift pump, G2 Rear Diff Cover

Pjigar, you are lucky. I chased rocker arm needles into the oil pan on my Libby!

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2020 Ram 1500 CC Ecodiesel Limited
1995 Dodge Ram 2500 4x4, 5.9 Cummins, 47RH, Reg Cab
2005 Liberty CRD,fixed the rockers and a couple more things,GDE Hot tune,Weeks Stage 1 and 2 EGR delete,Hot Diesel solutions Tstat assembly(wonderful heat!), ARP studs, OME 1.5" lift.....thanks Seth! (Sold)
2006 Liberty CRD....The Moose Hit