I'm afraid you'll have to take the covers off. a visible inspection really is the true answer.
Worn rollers I believe is the 'wear point' on these rockers, from what I've read. But remember, an engine that uses hydraulic lifters, and has been not run for awhile, will have more lash until they've 'pumped up' after starting the engine. I can't comment on what kind of click or snap we can hear is a sure sign of problems, or what is considered 'normal'.. I just don't have enough 'time' under my belt with this power plant!
fyi, my current project is a bad water pump bearing, causing the timing to slip big time.. I'm assuming the minimal damage is a pile of rockers that have self destructed 'by-design'.. I've got 16 new rockers coming from England. Just the rockers alone were 150 bucks delivered. (just the rockers, no lifter) I'm taking a chance that the wear and tear on my lifters and cams is acceptable, (80k miles). If I have further issues, and need cams/lifters, I'll have these for a spare set of rockers for 'next time'. The point here is for 150 bucks, it seems like a fair price to 'fix' to what seems a common found issue of worn rollers. Reading in 'here' seems like there is more guys finding pretty good slop than not. There are only a few guys who've owned these since 'new'. Most are someone else's abandoned child.. who knows what crap they ran for oil?? Maybe there is something to this in our 'woes'..
_________________ 2006 KJ CRD, bought 9/11/14, 70,500 miles. Circulating Rotella T6 5w-40 11-3-14 oem stat installed 11-5-14 gen II FH installed. Sasquatch elbow kit, samcos, GDE eco FT. 11-26-14 80,500 miles, engine is disassembled, awaiting parts 3/18 Budget?? Sure! 'Everything I have'. New "Pet" name for My Jeep; 'Soul Sucker'
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