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on the subject of mitsubishi's Sirius engines, could you please explain the 4g61 please ?
shorter stroke motor, so I doesnt need BS...
Also what no one took in accout is that even though both weights IN UNISON cancel out the vibrations that drivers feel, each balance shaft is still an unbalanced COUNTERWEIGHT rotating unevenly in their own bearings. Those bearings take a boat load of abuse. Dependant on the previous owner , those bearings might have taken some abuse.
Missed shifts, irregular oil changes, or just plain ol' high mileage. I've had BS's destroy TWO MOTORS, and have seen where a spun bearing threw a B/S into a wobble and blow a HOLE through the side of a block, and destroy a customers head. Your being a mitsu mechanic is great, but your reasoning far from gospel. I would venture to guess that there are those of us who have built-rebuilt, and wrenched on 4G63's a tad more than you. The best of luck with your reasoning as to why you leave them in, but I guarantee you this the first motor that breaks on you from a busted BS, and youre gonna have a sh*t storm on your hands trying to explain why you didnt remove them.
