balance shaft removal

[91-gsx]

I already posted a thread on this before, but could not find it and update it. I am going to remove the front balance shatf belt, but keep the balance shaft in place. I am just wondering what to do to the rear balance shaft. I was thinking of taking it out the gear that drives it, the one that is driven by the oil pump. And putting either a bolt or nut to hold the balance shaft in place, but now that the gear is gone, it will not spin. Am I missing something, if so please chime in.
thanks for the help

edit: I just noticed that the rear shaft gear is actually part of the rear shaft. So i was wondering if I took that shaft out of the car and used the bolt that held the shaft in and a nut on the other side. Couldnt I just block the hole off so that the bolt just sat there with a nut on the other side and the oil pump gear would never touch it?

 

[Dream On]

Just wondering, why don't you want to just eliminate the b-shafts?

 

[91-gsx]

Just wondering, why don't you want to just eliminate the b-shafts?

By making them not spin, I am eliminating them, or atleast the danger they pose when i rev higher. The front shaft cannot be removed, as far as I read, without removing the engine. I won't do that. The rear shaft seems to have to be removed. I am trying to find a way to leave it there, but not let it spin. I was wondering if i could remove the rear balance shaft sprocket without removing the front cover or anything. If I could remove the sprocket, then I can put the bolt back into the shaft and just leave it there. Why would I go through more trouble for no more additional benefits?
later

 

[SleeperG]

By making them not spin, I am eliminating them, or atleast the danger they pose when i rev higher. The front shaft cannot be removed, as far as I read, without removing the engine. I won't do that. The rear shaft seems to have to be removed. I am trying to find a way to leave it there, but not let it spin. I was wondering if i could remove the rear balance shaft sprocket without removing the front cover or anything. If I could remove the sprocket, then I can put the bolt back into the shaft and just leave it there. Why would I go through more trouble for no more additional benefits?
later

yeah go ahead and delete the rear balance shaft sprocket...
which is also the oil pump drive sprocket.
which is also one of the sprockets for the timing belt...

just think if eliminating b-shafts free's up power... imagine the gains from not having to turn an oil pump!!!

Sorry,
but there is no way around it man.

its not a hard procedure.
once you are in there.

 

[black91awdturbo]

you dont have to take the motor out to do this, it is a pain though if you print off the instructions and set a day aside you will be able to do it.

 

[kicker91laser]

I removed the front balance shaft on my 91 awd with the engine in. All I had to do was unbolt the front crossmember(the one that the front engine roll stopper bolts to) and drop the engine down enough for the front shaft to clear the body. I personally do not like the idea of leaving it in there, but others do it all the time. If you do not want to install the front bs bearings backwards, I wouldn't bother pulling out the front one. You will, however have to install a stubby shaft in place of the rear balance shaft-there's no getting around that.


EDIT- I highly suggest you read over the vfaq that covers this very carefully before attempting this mod

 

[91-gsx]

I would not mind running the rear stubby shaft. But I have not found the part # for it yet... It seems to me that the oil pump is rotated by the timing belt, and then the oil pump gear is what makes the rear balance shaft gear turn. Am I thinking of this in a wrong way or something? Please correct me if so. If this is the case, then couldnt I take the gear out and the bolt, and just leave the rear shaft in place as well?
thanks for the help

 

[Eclipsethis90]

The Mitsu PN is MD098626.

 

[silver eclipse]

The gear the oil pump spins that is attached to the balance shaft, is the oil pump. with out both of those gear in, you create no vacuum to draw up oil. Its not that hard to take the front cover off and put a stubby. I dont want to be rude, but this is one of those things that if your gonna do, do right, dont skimp.
-Chad

 

[kicker91laser]

http://www.vfaq.com/mods/balance-shafts.html

All of the info you will need on this

 

[91-gsx]

The gear the oil pump spins that is attached to the balance shaft, is the oil pump. with out both of those gear in, you create no vacuum to draw up oil. Its not that hard to take the front cover off and put a stubby. I dont want to be rude, but this is one of those things that if your gonna do, do right, dont skimp.
-Chad

See you learn something new every day. I did not know that the oil pump gear along with the balance shaft gear created a vacuum. I am not trying to skimp out at all man, I was simply trying to figure out a new way to do it, and see if I have a proper understanding of how it works. Now that you guys gave me the link to the stubby shaft part #, I atleast know I can get that. In the vfaq, the guy took off the front cover and the oil pump cover. From my undertanding, this could all be done without taking the oil pump apart, right? In other words, take the front cover off, hold the shaft in place while I break the bolt that holds the gear to the shaft loose. Take the shaft out, put the stubby shaft in. Hold the stubby shaft in place and bolt the gear to it and torque it down. Kinda on the right path?
thanks for the help

 

[kicker91laser]

You could do it that way, but you won't have anything in the pump gears to assist in priming the pump. You can try this, but before you put the t-belt back on, use a drill and a socket/extension to turn the oil pump sprocket CLOCKWISE to prime the pump, you can break the turbo oil supply loose and wait until oil starts coming out, then you will know the pump is primed.

 

[91-gsx]

You could do it that way, but you won't have anything in the pump gears to assist in priming the pump. You can try this, but before you put the t-belt back on, use a drill and a socket/extension to turn the oil pump sprocket CLOCKWISE to prime the pump, you can break the turbo oil supply loose and wait until oil starts coming out, then you will know the pump is primed.

I can put some grease on the stubby shaft gear and turn that. That way the gears will have oil on them before start-up.
Thanks for the help guys

 

[kicker91laser]

I can put some grease on the stubby shaft gear and turn that. That way the gears will have oil on them before start-up.
Thanks for the help guys

I would still trun the pump sprocket with a drill to ensure the pump is primed, or at least before initial startup, crank over the engine w/o spark plugs and wait until you start to build oil pressure.