Re: First post! Ticking/Knocking coming from top end?
Something is loose in there. Usually lifter tick goes away on higher revs since there is more oil flow going to them, but it cold very well be lifter noise. Pull the valve cover and check the rocker arm nuts.
If you had an inspection borescope of some kind I'd say snake it in the oil drain hole next time you change the oil and look at the #6 piston's skirt and see if it's missing any of it.
1995 XJ / 4.0L / AW4 / D30 w/No-Slip Locker / C8.25 / UPCOUNTRY spec suspension / 235/75R15
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