My friend just bought a CJ. One thing I noticed was a little ticking tapping sound coming from the engine. I don't know much about engines malfunctioning, mine all work fine, I have never had one die so I don't know all the different symptoms and how to id them. Knowing what I do know I decided to put Rotella T 15-40wt(I think) in his Jeep figuring that a little heavier oil might make things a little more comfy for the tired old motor. Sure enough within 2 seconds of the engine firing up the oil pump started flowing oil to the top end and the sound went away. It didn't go away instantly so to me it seems like the noise is in the top end. If it were the bottom I would think the sound would not have been affected by the oil pump as all of the bottom end is soaking in oil all the time. Would this be a sign of a bad or sticky lifter? I want to hear what some of you guys think. I'm know this is common from the searches I have done. I guess either way it is a bad sign, my 4.2 sounds downright great so I know it isn't just a jeep thing.
I am paranoid and don't want to see the engine crap out on him, everything else in the Jeep has in the month he has owned it(not the Jeeps fault, jackass PO is to blame). Sad thing is he sold his running '61 Scout to buy it because he thought Jeeps were more reliable....ironic. Also interesting is that IH outsourced the 258 from AMC so it is possible to get a Scout with a 258 AMC engine( a few IH trucks came with the AMC 401 when the IH 392 was scarce, the holy grail of IH engines is the AMC 401), the transmission options are similar and the some manufacturer, axles are the same(per year), t-cases are the same, everything is the same except IH has more engine options, comfort options, off-road options, beefier frame and more useful body. Seems like someone looking for the more reliable of the two wouldn't pick the Jeep.