I recently went through the rebuilding of a 4.0L sohc motor.WowW what a extra bunch of crazy! to add insult to injury, I fired the motor last night, took right off, new oil pump and lifters, good pressure, ya no how sometimes after a new lifter set in stall it takes a few mins to quiet all lifters? well driver side wonderful passenger side, not so much. It sounds as if the pass side is not getting the sufficient oil it needs. top it all off their is oil slowly pouring out the rear tensioner bolt? I put a new set of stem seals and replaced few bent valves... I have a few wild ideas but thought to throw problem out here before chasing my tail!
thank you!