Join Date: Nov 2000
Location: newly relocated to Huntsville, AL
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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)?
It is amazing what you can accomplish when you are too dumb to know that you can't!