2G Balance shaft removed (stub, shaft w/o oil groove)

[49erGizmo]

Car Info: 1997 GSX Eclipse
question? what is the purpose of removing the Balance shaft and will this cause problems in the future?
Parts List of what's been done to car and notice this....
Balance shaft removed (stub,shaft w/o oil groove)

 

[idkiliketurbos]

The balance shaft delete is popular to help increase oil pressure and eliminate the possibility of having a balance shaft belt take out the timing belt. The stub without the oil groove is not good. You will definitely want to change that. Here is a link to check out!

https://www.dsmtuners.com/threads/bse-a-look-at-stubby-shafts.468879/

 

[DSMPT]

Car Info: 1997 GSX Eclipse
question? what is the purpose of removing the Balance shaft and will this cause problems in the future?
Parts List of what's been done to car and notice this....
Balance shaft removed (stub,shaft w/o oil groove)

Like @idkiliketurbos mentioned above, there is a common problem that the balance shaft belt gets cut and it goes into between timing belt and sprocket and would cause wrong valve timing and then would bend valves. By physically removing it, you can avoid this problem. And less belt = less power loss.

Balance shaft removed (stub,shaft w/o oil groove)

Not a good idea. You can see the difference in the pic below. A stub shaft without groove most likely would end up in that way in the near future. The one without groove in the pic had way less milage, less time and less power/engine speed than the right one (Mitsubishi with groove). The difference is obvious.

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[007jimmy]

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I bought a fresh built block and found this after I got some kind of weird knocking noise. Less then 5k of “very easy driving”. No bearings were spun oddly enough. Not to mention I was battling very high oil pressures the whole time. Don’t cheap out on the stub.

 

[luv2rallye]

Watch 15:35-17:25 here to see what happens with an ungrooved stubby shaft

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[49erGizmo]

The balance shaft delete is popular to help increase oil pressure and eliminate the possibility of having a balance shaft belt take out the timing belt. The stub without the oil groove is not good. You will definitely want to change that. Here is a link to check out!

https://www.dsmtuners.com/threads/bse-a-look-at-stubby-shafts.468879/

I looked at videos and links so no matter what in order to replace the Stub I have to pull the motor out.
dang time to look for a cherry/picker

 

[luv2rallye]

No - I just replaced the entire front case (with oil pump) on my 99 GST (including removing rear balance shaft but not the front balance shaft) with the engine in the car (and have pics to prove it). It's a tight fit (and you'll have to remove the oil pan) but can be done. However you'll need this tool (MD998162) to get the plug (MD125376) off the rear balance shaft opening to remove the balance shaft's flange bolt: https://mitsubishi.service-solutions.com/Detail/15/MD998162-01-PLUG-WRENCH.

 

[jakelandry]

Just to add for future searches, I also had a groove less stub shaft seize. It took out my oil pump and broke the gear in half like the link in post 2. I thought it was ok because the stub shaft came with a spec sheet that said it needed .006” clearance which I had. Mine didn’t even make it down the street before failure.

 

[luv2rallye]

Make no mistake, using a stub shaft w/o the groove in it WILL DESTROY YOUR ENGINE due to insufficient oil pressure.