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108 Posts
I was heading out to Moab when my 06 LJ started to misfire (P0304 code), tried working on it in Moab and nothing seemed to work, I replaced the coil pack on a hunch and that seemed to make it worse, put the old coil pack back on. I replaced spark plugs and noticed the #4 plug was wet with gas, I thought I might have a stuck open injector, but I couldn't find an injector in town. Heading home the Jeep started to run even worse, I stopped in Grand Junction debating what to do, after starting the engine, it made a knocking sound for a couple seconds and I started to think the worst. I caught a ride home on a friends trailer the next day. Brought it into a shop and after putting a camera into the spark plug hole and cranking the engine, he noticed the intake valve was not opening. The tech pulled the head off and found the tappet was worn so bad that the spring inside actually protruded out of the bottom of it.
Back when I had about 10k on the engine I had this problem http://rubiconownersforum.com/phpbb3/vi ... 22&t=45470 After that work was completed I hadn't had any other problems until this trip. Now my LJ has less than 35k miles on it and the tech wants to put a new engine in it since those metal filings must have gone somewhere, and there's no telling how much other damage is done. That all makes sense to me, but now I would like to know what went on inside the engine, since I do regular oil changes with synthetic oil and check it regularly and the engine has never lost a drop of oil. I'm wondering what the odds might be if I can bring it back to the dealer and have it covered. I'm past the 3 year warranty but something has to have been going on in there for a long time. I always thought this LJ ran rougher than my previous LJ and TJ and am wondering if the work done on it a few years ago was a band aid to get them through the warranty or what.
Any help, thoughts, or suggestions would be appreciated.
Back when I had about 10k on the engine I had this problem http://rubiconownersforum.com/phpbb3/vi ... 22&t=45470 After that work was completed I hadn't had any other problems until this trip. Now my LJ has less than 35k miles on it and the tech wants to put a new engine in it since those metal filings must have gone somewhere, and there's no telling how much other damage is done. That all makes sense to me, but now I would like to know what went on inside the engine, since I do regular oil changes with synthetic oil and check it regularly and the engine has never lost a drop of oil. I'm wondering what the odds might be if I can bring it back to the dealer and have it covered. I'm past the 3 year warranty but something has to have been going on in there for a long time. I always thought this LJ ran rougher than my previous LJ and TJ and am wondering if the work done on it a few years ago was a band aid to get them through the warranty or what.
Any help, thoughts, or suggestions would be appreciated.