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Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

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post #1 of (permalink) Old 07-26-2009, 10:59 PM Thread Starter
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Constipated Jeep

i just replaced the head gasket on the jeep (00 TJ, 4.0L, 125k miles). when i took the valve cover off to remove the head, i noticed that there was a good amount of sludge. so i cleaned the head before putting it back on. but when i went to drain the oil, nada! not a drop. so i had to use a screwdriver to get it going, (like a butter knife and a heinz ketchup bottle!) and the sludge started to ooze out. when i took the filter off, i found the same thing. it's packed solid. so that leaves me with a couple questions.

1) what causes this? i use Amsoil and change oil every 5k miles.
2) now what??? realistically, i was trying to fix this on the cheap anyway, so i'm not wanting to do a complete tear down. what i have been doing in dumping in kerosene, then clean oil (there kerosene breaks it loose, and the oil pushes it out). i'm planning on doing that for a while, then lots of assembly lube when i put the rockers/rods on. then start it, let it warm up, and then change the oil. maybe even do that a couple times.

anyone else have any ideas (besides pulling the engine and overhauling it)?


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post #2 of (permalink) Old 07-27-2009, 11:32 AM
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If it wasn't making noises, suggesting oil starvation, then I'd say you are doing the right things. I've used diesel fuel for the same reason. I'm wondering if the Amzoil isn't leaving all it's additives into the pan...
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post #3 of (permalink) Old 07-27-2009, 07:22 PM
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I would pull the pan and clean all the gunk out of it and get as much of the other stuff out of the engine as I could before putting the pan back on. I would use something like diesel fuel or kerosene.

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post #4 of (permalink) Old 07-31-2009, 09:00 AM
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I used Easy Off oven cleaner. It took several applications but eventually cut the very nasty stuff. WARNING: Don't inhale fumes...they will singe your nose hair.

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