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Q: need valve adjustment specs and actions that go with it, if any, thanx. on 2000 Jeep Wrangler

knocking noise from engine, especially after the engine gets warm.
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The 2.5 L engine has hydraulic tappets. There is no adjustment . You may have a defective tappet or are hearing the knocking noise from another source, possibly carbon buildup on pistons, piston slap, or lower end bearings.
I also have this same issue. What did you find out? I would sure like to know as I am leaning towards listers or valves Thanks
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