General engine tech -- Drag Racing to Circle Track
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- Posts: 173
- Joined: Fri Dec 28, 2007 9:33 pm
Have a customer with a 3.7 Jeep liberty. Rocker arms keep falling off. One or two at a time. Put them back on, everything feels tight, take a test drive and others fall off. Not the same ones all the time. Random ones. I have the heads pulled apart. None of the seats look like they have moved,guides are good,no sticking valves. Springs are good. I see nothing to cause this. Only thing I see is all but one lifter is collapsed. You can pull the plunger up and down. But I don't know what they will do when running with oil pressure. We are going to replace the lifters. Id hate to do a valve job and his rocker arms keep falling off. Any ideas or what to look for. Web search says valve seats fall out but there's no indication that any of them have moved.