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I'm always in favor of retaining engineered components/systems. I was just checking to see if there was something I missed in regards to efficiency, or well documented failures, etc.


The balance shafts ARE a documented failure point, or at least the bearings are (probably because they're a PITA to replace and get skipped during a rebuild). Plan on installing new balance shaft bearings with your overhaul, as well as a new oil pump. You might also want to search for the thread on oil pump relief valve shimming as described by FastEddy - good knowledge there.

95 Montero SR
3.8 MIVEC, Advance headers, 2 1/2" exhaust, Magnaflow muffler, OME shocks & rear springs, 2" body lift, 3" tank lift, 4.90s, TRE front locker, factory rear locker, Roger Brown Rock Sliderz, 315/75r16 (35") tires, Sport big brakes