Yea just leave the balance shaft belt off, ive ran all my cars with out em and never have a problem[DOUBLEPOST=1414440677][/DOUBLEPOST]The balance shift belts r there to dampen idle vibrations, u wont notice much of a change, if at all, and it frees up a little hp

Size9Zombie said:

Yea just leave the balance shaft belt off, ive ran all my cars with out em and never have a problem[DOUBLEPOST=1414440677][/DOUBLEPOST]The balance shift belts r there to dampen idle vibrations, u wont notice much of a change, if at all, and it frees up a little hp

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I hope this isn't jacking a thread. If you can just leave the belt off why do people even go through the effort to delete them? I've been causally reading up on this debating on wether or not to do it.

There is ton of info and miss info out there about balance shafts, what they actually do, and the pros and cons. The vibration is generated because the movement of the conecting rods in an inline engine are not symmetrical throughout crankshaft rotation. Due to this the engine has an inherent 2nd order vibration (vibrating at twice the engine rpm) because during any given crankshaft rotation the asending and desending pistons are not always completely opposed in their acceleration giving rise to a net vertical inertial force twice every crank rotation. balance shafts only help to "mask" or hid this vibration, if u chose to keep your belt use a kevlar belt and chamge it every time u do your timing belt (about every 60k miles) lots of people say the vibration of the engine going unchecked by balance shafts can damage or shorten the life of things like crank bearings, clutch discs, and transmissions but this has not been my experience. I have a honda accord single cam 2.2 tht has balance shafy belts removed for last 100k+ and never caused any trouble[DOUBLEPOST=1414465530][/DOUBLEPOST]Sry for long ass post just wanted to lay down the facts in entrity, if a wiseman has something to add please do[DOUBLEPOST=1414466095][/DOUBLEPOST]The kit is so u can remove the balance shaft all together and block off the holes left behind, u dont have to remove the shafts, just take the belt off

Unless you install a stub shaft on the oil pump shaft you'll have more vibration than a true balance shaft delete. There are two eccentric shafts, the balance shaft belt turns one, and the other is ran off the oil pump.

Also, a balance belt breaking like that suggests that the balance bearings could be bad for that shaft. If that is the case, just leaving the shaft in place will bleed off lots of oil pressure.

The correct way to do things is to pull the oil pump, inspect the front shaft bearings. If they aren't spun, or damaged, turn them to block off the oil port. Then install a stub shaft in the rear balance shaft location. If the front bearings are damaged, you'll need to remove the block plugs, tap the oil gallies for plugs, and replace the block plugs.

Oh, the pity of having "Undersquare" motors (more stroke than bore) where we need BS to counteract the vibration due to the long strokes of our motors.

If we had the "Oversquare" 420A motors (more bore than stroke) in our vehicles, we wouldn't be fussing with any BS stuff, but the torque would be much less with the shorter stroke.

Suby's had it right - two pistons opposite each other creating a "push/pull" action and this action makes for a balanced motor.


True though: when doing belts, please do both of them at the same time.

-DSM

donniekak said:

Unless you install a stub shaft on the oil pump shaft you'll have more vibration than a true balance shaft delete. There are two eccentric shafts, the balance shaft belt turns one, and the other is ran off the oil pump.

Also, a balance belt breaking like that suggests that the balance bearings could be bad for that shaft. If that is the case, just leaving the shaft in place will bleed off lots of oil pressure.

The correct way to do things is to pull the oil pump, inspect the front shaft bearings. If they aren't spun, or damaged, turn them to block off the oil port. Then install a stub shaft in the rear balance shaft location. If the front bearings are damaged, you'll need to remove the block plugs, tap the oil gallies for plugs, and replace the block plugs.

Click to expand...

And thats what wisemen are for, thank you!

What if I just pull the rear shaft out and replace it with the stubby shaft?
Is it hard to get that one out if I do it while the engine is in?
Plus if I leave the front shaft in, I won't have to worry about the high oil pressure commonly associated with the BS elimination.